This is a 2019 Jeep Grand Cherokee. It has a feature that can shut the engine off when you stop and restart it when you’re ready to go. The problem here is that the start-stop feature isn’t working anymore.
Start-stop is a system that turns the engine off when you’re stopped (like at a light) and turns it back on when you’re ready to move. If something isn’t right—like the battery or a warning code—the car may turn this feature off.
The gas cap has to seal correctly. If it’s off or loose, the car can detect a small emissions problem and turn on the check engine light, which may also disable start-stop.
The check engine light comes on when the car’s computer finds a problem. It can be for the engine itself, but sometimes it’s also triggered by other systems that affect how the car runs.
Stop-start is a feature that turns the engine off when you’re stopped, then turns it back on when you press to go. It’s meant to save fuel, but it needs the battery to be healthy to work correctly.
“Codes” here means diagnostic trouble codes (DTCs) stored by the car’s computer when it detects an abnormal condition. A scan tool reads these codes so you can identify the specific subsystem causing the problem instead of guessing.
A scanner is a tool that plugs into your car and reads the computer’s error messages. It helps you pinpoint the problem instead of replacing parts blindly.
Battery voltage is how much electrical power the car’s battery is providing. If it’s too low (or fluctuating), the car may disable stop-start and log warnings.
EVAP is a system that keeps gasoline vapors from escaping into the air. Instead, it stores those vapors and later sends them to the engine to be burned.
The leak detection pump is a small EVAP-system component that helps the car check for fuel-vapor leaks. If it can’t build or hold pressure, the car may light a warning and store EVAP-related codes.
The vent valve is a small EVAP component that controls how vapors move through the system. If it doesn’t open/close correctly, the car can’t regulate EVAP operation and may set a code.
The BMW 3 Series is a compact car made by BMW, usually as a sedan or similar body style. The “E30” part refers to an older generation of that same model line. People talk about it because it’s a well-known older BMW that many enthusiasts still work on and drive.
E10 means the gas has about 10% alcohol (ethanol) mixed in. Some cars handle it fine, but older setups can be more sensitive to higher ethanol blends.
Term
E20
E20 is gas with about 20% alcohol (ethanol). It can affect how the car runs and may be tougher on some fuel-system parts if the car isn’t meant for it.
Ethanol is a type of fuel made from plant material that’s mixed into gasoline. Different blends have different percentages, and that can affect how the fuel burns in your engine. The hosts are discussing why ethanol is being pushed and where it comes from.
The BMW 1 Series is a smaller BMW model than the 3 Series. The podcast is comparing it to other older BMW generations, saying it’s not the same one being discussed. It’s brought up because it’s a different size and generation within BMW’s lineup.
Octane is a fuel rating related to how resistant gasoline is to “knocking” (premature combustion) in an engine. The host is discussing whether switching to higher-octane fuel all the time would be worth it compared with the benefit of higher fuel economy.
Leaded gas is older gasoline that had lead added to it. Lead is harmful, so the host is pointing out that you can’t just switch fuels carelessly because of the serious effects lead has on living things.
An Allison transmission is a heavy-duty automatic transmission used in trucks. It’s designed to handle more stress than many regular automatics, so repair shops often treat its problems differently.
The service manager runs the dealership’s repair department. They’re usually the one coordinating the repair and talking to you about what’s covered under warranty.
The parts manager is the person in the dealership who handles ordering and supplying the right replacement parts. They help make sure the correct part number gets used for the repair.
This means the dealership couldn’t get the problem to happen while the car was there. If they can’t see it, it’s tougher for them to prove what’s wrong and fix it the first time.
Flushing the fluid means replacing the old transmission fluid with fresh fluid. It can help if the fluid is dirty or degraded, but it’s not a guaranteed fix for every transmission problem.
Traction control helps the car not spin its wheels when the road is slippery. If it says it’s disabled, the car thinks something isn’t right, so it turns the system off to avoid making things worse.
Term
new trend
“New trend” sounds like it should be “new transmission.” The point is that the shop is replacing the gearbox with an updated one that’s meant to fix a known problem.
The transmission is the part that changes gears so the car can drive smoothly at different speeds. If they’re talking about a “new transmission,” it usually means replacing the gearbox with one designed to be more reliable.
Concept
manufacturers to replace a part with a better up the sole
This describes a common manufacturer practice: issuing an updated “superseded” part to fix a known issue, often without changing the visible part number. The goal is to improve durability while keeping the ordering/fitment process consistent for dealers and service departments.
A part number is like the part’s ID code used to make sure you get the right replacement. Sometimes the maker improves the part but keeps the same ID so it’s easier to order.
An oil filter cleans the oil as it circulates through the engine. The host is using it as an example that makers can improve parts over time without changing the label you order by.
“Locks up” means the transmission stops working normally and gets stuck in a protective state. That can make the car behave strangely or even dangerously, so it’s a big warning sign.
The transmission has computer software that decides how it should act while driving. In this case, the software is supposed to notice trouble early and warn you before it becomes a bigger problem.
After a transmission change or update, the car may need some time to “relearn” how to shift smoothly. That can cause temporary hesitation, but if it keeps happening after a while, it needs to be checked.
A transmission cooler is like a small radiator for your transmission fluid. It helps keep the fluid from getting too hot. If it’s contaminated, it can send dirty fluid back into the new transmission, so the shop has to decide whether to flush it or replace it.
A warranty is a guarantee that if something goes wrong within a set time or mileage, the repair may be covered. The host is saying that coverage can end exactly when the clock/miles run out, and after that they might not pay.
GDI means the fuel is sprayed directly into the engine, not into the intake. A GDI cleaner is designed to loosen the sticky carbon that builds up on the intake valves and can mess with how air and fuel mix.
This is a fuel additive kit made for cars that inject gas directly into the engine. It’s meant to clean more than one area—so deposits don’t keep building up on the intake valves.
The induction system is how air gets into the engine. In GDI cars, it also matters because carbon can build up on the intake valves, and some cleaners are designed to reach that area.
Carbon buildup is gunk that forms on the inside of the engine, especially on the intake valves. In direct-injection cars, it can build up faster and then make it harder for air to flow correctly.
Fuel trims are the computer’s way of adjusting fuel delivery to keep the engine running right. If the engine can’t get the right airflow because of deposits, it may compensate by adding or subtracting fuel.
Radial tires are a modern tire design where the cords are arranged in a way that helps the tire flex more evenly. They’re usually the standard choice on newer vehicles.
Term
bias belt
Bias-ply tires are an older style of tire construction. They can feel different from radial tires, and some classic owners switch to bias-style tires to keep the original look and driving character.
“Mag wheels” usually means lightweight alloy wheels, often magnesium. People like them because they can change how the car feels compared with heavier steel wheels.
Term
factory magnesium
Magnesium is a lightweight metal. The host is saying some cars originally came with magnesium parts (likely wheels), and later owners may swap them for different “cool” wheels. Going back to the original magnesium setup is partly about keeping the car as it was built.
Concept
originals
“Originals” means the parts that came on the car from the factory. People often want to go back to those because they fit correctly and match the car’s intended setup. It’s especially common during restoration or when trying to keep a car authentic.
Alignment spacers are little metal shims used to fine-tune how the wheels sit. Mechanics use them to get the wheel angles correct so the car tracks straight and wears tires evenly. They come in different thicknesses so you can adjust the suspension a little at a time.
The control arm is a key part of the suspension that holds the wheel in the right position. When you loosen it, you can adjust where it sits. That’s how mechanics can correct the wheel angles during alignment.
Term
alignment guy
An “alignment guy” refers to a specialist who performs wheel alignments, often using older, manual methods when modern alignment equipment can’t measure or calibrate correctly for a particular vehicle. In the segment, the host describes using a tape measure and spray paint to set the wheels.
The Ford Model T is an old car made by Ford, from the early days of mass-produced automobiles. It’s famous for being one of the first cars many people could afford. The podcast is using it as an example of a car that’s still possible to service, like changing the oil.
The Ford Cougar mentioned here is a classic American car from the early 1970s. It’s the kind of car people remember for its style and for being part of the muscle/pony-car era. The podcast is calling it a well-known classic that people still talk about.
A convertible is a car where the roof can fold down. On older ones, the roof seals can wear out, so rain can leak in unless the top and seals are in good shape.
“T-tops” are a type of roof where you remove two roof panels, leaving the car more open. Older T-tops can leak if the seals wear out, and the removable panels can also be a theft target.
This is a 2016 Acura MDX SUV. The discussion is about problems on the front wheel—specifically the wheel-speed sensor and related parts in the hub/bearing area.
A wheel bearing is the part that helps your wheel rotate smoothly. If it’s worn or damaged, it can cause noise or vibration, and it can also be connected to sensors that the car uses for braking and stability systems.
A wheel speed sensor tells the car how fast each wheel is turning. If it doesn’t work (or isn’t reading), the car can’t properly control ABS or traction, and it may show warning lights or codes.
A sealed hub means the wheel’s hub/bearing area is packaged as a sealed unit. If the sensor is part of that assembly (or attached to it), you may need to check whether the whole hub assembly is the real issue—not just the sensor.
A tone wheel is a toothed ring that spins with the wheel. The sensor reads those teeth to figure out wheel speed—if the teeth are broken or cracked, the sensor may not get a usable signal.
ABS is a safety system that helps your brakes not lock up. When you brake hard, it can automatically adjust braking so the wheels keep rolling and you can still steer.
An open circuit code is basically the car saying, “I can’t get a complete electrical connection.” That can happen if a wire or connector is damaged or a sensor isn’t communicating.
A magnetic pickup is a sensor that uses magnetism to “read” the spinning teeth on the tone wheel. If the teeth are damaged or the sensor can’t read them, the wheel-speed signal can be wrong or missing.
A ceramic magnet is a strong magnet used inside some car sensors. The sensor uses magnetism to create a signal the car can read, so if the magnet/sensor isn’t working you may get no reading.
Daytime running lights are lights that turn on in the daytime so other drivers can see you. If they stay on at night, they can change how bright and how focused the light is compared with your regular headlights.
A Subaru Forester is a compact SUV that many people use for everyday driving and bad-weather conditions. Here, the caller says their 2018 Forester has a headlight problem, which is important because the exact headlight setup can differ by year and trim.
A “voltage issue” means the car isn’t sending the right amount of electricity to the light. If the voltage is wrong, bulbs can flicker or burn out quickly. The right way to check is to test the voltage while the light is actually turned on.
Halogen is a common older type of headlight bulb. If the car is sending too much or unstable electricity, halogen bulbs can burn out quickly. So it’s important to check the electrical supply, not just replace the bulb.
“Measure voltage” means using a multimeter to check how much electricity the car is sending. The key point is to test while the light is actually on, because the voltage can change under real load. That helps you find whether the issue is the wiring/switching or the bulb area.
Here, “load” means the light is turned on and drawing power. If you measure voltage with the light unplugged, you might not see the real problem. Measuring while it’s on shows what the car does under normal use.
Pigtail connectors are small plug-in wiring pieces used to fix damaged wiring near a light or connector. If the wires at the end are corroded or broken, you can replace just that section. It’s often easier than replacing the whole wiring harness.
The fuse box is where the car keeps safety switches (fuses) for different electrical systems. If the fuse for a light blows, that light won’t turn on until the fuse is replaced.
In this context, “bulb” refers to the replaceable light source in a headlight or other lamp assembly. If the bulb is burned out or not making proper contact, replacing it (and the socket/connector) can restore operation.
A headlight is the front light you use for driving at night. People often buy the same bulb type in packs so they can replace both sides or keep a spare.
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Here is the Under the Hood Show podcast.
This is Under the Hood.
Welcome to the Under the Hood Show.
We are glad to have you with us, Russ Evans, here to answer your automotive questions.
Thanks for joining us.
We appreciate it.
I'm Chris Carter here to answer your calls at 866-594-4150.
Shannon Nordstrom, not here this week.
But you know who is here?
I was wondering over the all week.
Producer Doug.
No, I was thinking all week.
I was like, you know what?
I wonder, Shannon's going to be gone.
I wonder if we're going to get any calls from Harry.
See, I just kidding.
I saw Doug just sent me a message at our first caller is Harry, who's going to tell us what
we can help him with.
Harry, you're on the Under the Hood Show.
What can we do for you?
Okay.
Thanks, guys.
That's the appropriate reaction.
Thanks.
I've got a 2019 Jeep Grand Cherokee Laredo, and my start stop had seemed to go on the
blank, and it was my wife's car, so I don't drive it that much.
But it was not a good battery, so I changed both the batteries, the main one in the start
stop, and it did not remedy anything that went wrong with it, and it's kind of like
it's chugging along and it doesn't get the power.
So, I changed all that.
I changed both batteries, and it's no results, so I'm thinking something else if you guys
can help.
So no stop start at all.
It's just off?
Well, it went off.
I mean, I just found that you don't want to stop.
It wasn't working like it used to.
Not shutting off when you start on?
No.
And no lights on the dash?
And is the engine light and the stop start light also?
If the check engine light is on, any code in the system will shut that system down.
Any code?
It's leaving the gas cap off.
I mean, that's the one that everybody hopes it always is.
And I was going to say, if that light's not on, well, you got a dream that most people
wish they had, no stop start, it just doesn't operate, and there's no check engine light,
no codes.
But in your case, you've got a code.
If you fix that code, you're going to fix the stop start problem.
Now one, the stop start light being on can be caused by bad stop start battery.
And when those fail, yeah, it'll turn the check engine light on because the stop start
is telling it to shut down.
But any other code, fuel cap, misfire, anything like that, air conditioning, pressures can
do some weird stuff sometimes.
And I mean, you could just have, you need to plug it into a scanner and find out what
those codes are.
And once they're fixed, this, this issue with the stop start should go away unless it's
originating from the stop start.
And it says something like starter malfunction or battery voltage that then that would be
turning the check engine light on, but scanning it is going to be the first, first thing.
But you, you did the right thing.
So many of these batteries were replaced in these vehicles, even within the last year
or two, that just were not up to par from the factory.
They had some defects in those batteries and a lot of people put in new batteries.
They replaced them and they took care of the, the issue.
So I know we had one of our own family had to put a new battery in one of those because
it just started, just wouldn't do it and wouldn't start to vehicle.
Get it, get it in somewhere where they can read the codes, find out what they are on
a 19 G, you know, one of the first things that comes to mind for me would be, you know,
evaporative emission system or a misfire code causing that issue.
So I would, I would look and just don't be surprised if one of those two comes up and
either one of them is pretty, usually a pretty straightforward lower end price repair if
they're needed.
You know, a lot of times when the evap systems fail in those, it's what they call a leak
detection pump that monitors the pressure in the, in the back.
And it also is the vent valve back there that runs that.
So they fail all the time.
Harry, thanks very much for the call.
Good luck.
Just when you say lower end, there was a time when that under 500 bucks, yeah, I was going
to say there was a time that that meant $80.
Yeah.
Under a hundred bucks and it's no longer, that's pretty much doubled in the last four
years with everything else, price of health insurance, house insurance and everything
gas.
866-594-4150.
Let's talk to Scott.
You're on the end of the hood show.
Scott, what can we do for you?
Well guys, this is just a more or less a shout out for the E30.
I've used, I've used the anywhere from E10 to E20 for years in my Nissan's.
And recently they have it in Mitchell for E30 for three and a quarter.
So I thought I'd try a tank in each of them, or I've got a 2012 Altamon and a 2018.
And it was during that hot weather or what, the last week or no, it was in the 90s.
Anyway, my 18, you know, not much changed.
Performance with startup was the same.
Everything was the same.
It dropped the mileage probably about a mile and a half or two or whatever.
So now it only gets like 38 on the highway, but that ain't bad.
My 2012, that surprisingly, because of the high mileage I didn't know is it's going to
have almost a half a million miles on this wall, untouched, it deepers it just like
I put another motor in it, just barely touch a throttle in a way it goes.
Hot startup is good and mileage hasn't changed, you know.
So just recently in Mitchell, it was, for a while there you could get E30, but not until
just recently this one, the truck stop here has the E30, so I thought I'd try it.
It is amazing how that number on the price board makes a difference what we choose elsewhere
and can be a detriment.
Do you have anything official?
Scott, thanks very much for the call.
Do you have anything you officially want to say about Scott's call?
Well, you know, legally they don't certify it, so you're not supposed to use it, but
a lot of people do.
I mean, there's thousands of people out there that are using it.
You can go on YouTube, internet, everywhere you're going to find people that do it.
You know, we're not endorsing it, but we're using it in our own vehicles.
You've got to, you've got to do it, you know, make your own decisions.
Kind of like though when you're watching, you listen to those disclaimers we have,
but when you watch any kind of show on TV where they're definitely giving you
financial advice and they say, I am a certified CPA or whatever and I do this
for a living, I'm a registered fiduciary, but they say, but in no way is this a
financial advice.
Yeah, we do that certification.
You know, we got one of those.
Yeah, we are professional mechanics in the shop every day of our lives for
entertainment purposes.
This is for entertainment only.
If you're not paying us in the shop, it's for entertainment only.
And we have had, we've read articles and talked to people who shall remain unnamed
because they, we don't know their names that have said that over the years,
E30 has been, and this is, this is not our, this has been in the public and
been in the news.
E30 is the sweet spot.
E30 is that one where it maintains and also fixes some of the problems that E10,
E20 have had and then engines can, yeah, so that E30 has been kind of a target
for a lot of people over the years.
In clothing manufacturers, they'd like to see that higher octane in everything.
So they could do more with it, but you got oil companies that don't want that.
They want the gasoline.
They want to sell it.
They want to make what they can.
And I understand that it's, it's company for profit and get as much as you can.
Um, but the ethanol, people want more ethanol because they're for profit.
They want to make as much as they can.
Um, bottom line is the ethanol comes from the United States.
The ethanol is made here, refined here, ready to go here.
We're not buying it.
We don't have to worry about any of that.
So if you could, anytime you can rely on your own here at the show, we started
doing with internet things and podcasts.
We started relying on ourself for things when we relied on other people and
there was a problem.
We had a problem and it took longer to fix and it cost us more money.
So I, I don't know what's going to happen.
I, I don't have any faith in, in what should happen anymore until it just does.
If there were, and this is, this is not us, this is not, I think this is just true.
I think I've learned this is, this is completely 100% true.
If there were only one fuel for vehicles, one quality, one fuel, one mix, just all
country wide, let's go nationwide, but in any of it, if there were just
one mix of fuel that was the same consistency, we could have the cars that
get one gallon of gas for a year.
I mean, we, not really, but we could.
Amazing.
We need a hundred octane fuel.
If we could get one thing where the truck isn't dirty or that.
No premium, no, this is no E88, no E30, whatever, whatever it is for a week, just
us, just a hundred octane, everything in every car, every day, no matter what
the old cars will run on a hundred octane, the brand new ones will run on a
hundred octane, but what they can do with a new car is change the tuning of it and
get several more miles per gallon on it at a hundred octane and everything you
would see pickup trucks that come city miles per gallon over 30 all the time.
You'd be 30 to 40 miles per gallon.
You'd see Toyota Prius is in that 80 mile per gallon range.
They could tune them and do things with it.
And that fuel might cost a little more, but you've got to, you've got to find
out, you know, first you got to find out what your baseline is.
And then they've got to figure out for the fuel costs and then you got to just
kind of look at it and see where do we need to be to produce a higher octane
fuel all the time and does that outweigh the extra miles per gallon.
And if, if this concerns you, if this is a, if you're up on this, imagine
aviation fuel, they are, they are working hard to try and get.
They want the price down, but it's always the same.
Right.
And they want to make sure that, because they don't, they don't get to have
a rough running engine for a few weeks.
No, and it's good.
At least you're getting the same fuel wherever you usually go.
And with the leaded gas, they're trying to move that over, but they have to do
it right because you can't, you can't really miss when you're
birds are all getting heavy from the extra lead.
866594415 oh, that's the number to reach
us here at the end of the hood show.
Let's go to Nebraska and talk to Rich here on the end of the hood show.
Rich, what can we do for you?
I've got a 20, 21 Chevy Duramax, three quarter ton, 10 speed, Allison transmission.
And the dealer just replaced the transmission under warranty.
And the question I had was, do you think the transmission that they
the one that was in there, or is it going to have the same problems?
And before you ask, answer that question, I would like to give a little background
information.
And first off, I asked the dealer that question and asked the service manager
and as well as the parts manager, and they both gave me the same answer, like
as if they're reading from a script and they just say, well, the transmission
we put in there is the same model number as the one we took out.
And that's basically all they'll tell me.
Uh, this pickup has 62,000 miles on it, and the transmission was replaced
less than a thousand miles ago.
And the other day I was going up a hill, we got some hills here about, and
actually I live in Arizona now, we live up in the northern part where there's
hills and I'm going up the hill, six percent slope, you know, three or four
miles long, get behind a truck and 40 or 40 miles per hour, I gently
accelerate to go on around because this is a four lane highway and it
hesitates, it blugs, it doesn't want to pull down and then it goes normally,
which that's what this transmission did when it had 40,000 miles on it.
That was my first indication that maybe there was a problem with the original
transmission and it looks like maybe it's starting to do the same thing
less than a thousand miles.
Now, when it had 40,000 miles on it, the dealer, I took it into the dealer
under warranty and they couldn't repeat the problem.
So with 40,000, I hadn't flushed the fluid and it never did it again, never
acted up again until nothing ever happened again until when it had 62,000
miles on it and one day the pickup wouldn't restart, it just had all kinds
of on the display, said that the traction control was disabled, it was out of
fuel, there was just several different items came up on the display.
And I sat there for a little bit and then it finally did restart with the
check engine light on before I could even get into the dealer, which was just
a few miles, the check engine light went off.
So when they pulled the codes, the next thing I know, they, they call out and
said, Hey, we're going to give you a new trend.
Interesting.
I didn't even know there was a problem at that, at that point.
But anyway, yeah, so the question is, I guess, do you, do you think this new
transmission is any better than the old one, or maybe, maybe I should trade it
off while it's still working?
Well, it is common for manufacturers to replace a part with a better up the
sole, they're on the shelf.
And as they build them, if they know there's a known issue, they will upgrade
it to make it stronger and better.
And they do not change the part number.
It stays the same, just like oil filters.
Tell people with working transmissions that they've changed anything.
No, you know, like a, like an oil filter, PF 63 oil filter is still going to
be a PFC oil, the 63 oil filter, but they may have upgraded the drainback
valve in it and things like that.
They change things and they don't do that.
If they, if they do upgrade it, well, what does that do?
It throws a red flag out and says, so there's a problem with the old one.
Well, I have an old, what, and they get all the questions and people are
bombarding them, thousands of people are saying, well, you upgraded it.
What about, what about mine?
I have the old one.
Well, you do.
So if there's something to fix and they know what it is, they should be
making slight changes to make them stronger to keep their warranty returns
down so they don't have to, they don't want to lose money on, if they can
build the new ones for the same price, but with a different part, then they
don't have to worry about the warranty on the ones they already have.
Is it to the case that the service manager, whoever might not know the
details or have details on it, might just be going, it's the same.
There's pretty much standard stuff.
If they don't know, they're like, I don't know, it's got the same number.
It's the same.
Yeah.
A lot of those service guys are not mechanics.
They don't know they're, they're doing a job of service, their customer service
people on this transmission.
There's, you know, a lot of discussion about this known problem.
Usually it just replaced the, the control control module.
Yeah.
Usually they just control that with this, with this problem because it's, it's
been a lot in the news about how it locks up the back wheels and, you know,
and, and, and so it's kind of a known, this transmission has been known as
having a problem.
And actually it did, it did even get called, and this pickup did get called
in on a recall for the transmission, but all they did was they didn't
have the software and the software is then supposed to tell you, you know,
several thousand miles before the transmission locks up, it's supposed to
tell you that it's, that it's got a problem, which, which I suppose is what
happened to, to me in this case, because it did, it did come up with that
code, that there's a problem, but, but again, because of this known problem,
it just seemed to make sense to me that they, this thing should be new and
improved, but yet with a thousand miles, it kind of has this little hesitation
thing again, and it concerns me about what, what the future may be.
Yeah.
I mean, it may have a problem, but they also take several hundred miles to
relearn after they're installed.
So it may take a while to relearn, but if it does have a problem after it's
been driven a, you know, a few thousand miles and it's still doing the same
thing, you need to get it back in so they can, they can take care of that
because it's, it's new.
It should be under warranty and you may, it's definitely good.
Yeah.
The good thing is that they extended the warranty.
I think the warranty now is, I can't remember for sure, but I think it's
like 10 years, 150,000 miles.
They don't want, I do have one other question if I could about this.
Okay.
When they replaced the transmission, they didn't replace the cooler.
And I had kind of questioned about that.
I said, well, you know, I think normally trans, replace the transmission.
If it's coming apart, we ought to get the cooler out of there so we don't
reintroduce a bunch of trash back into the new transmission.
And they assured me that the, the fluid was only dark in color.
There was absolutely no, no material in the, in that standard fluid.
And so they said, they'll flush, they'll flush it out and, and leave it there.
Do you think that was a good decision to leave that cooler in there?
Yeah, we've done thousands of them and we don't, I mean, we have to pay for it
if we have to do a warranty so we don't want to run into that situation.
And if we have metal in there, we replace the cooler.
If it's just dark fluid, we flush it and it's fine.
Doesn't hurt a thing.
It's the metal you can't get out and that will damage the new transmission.
And is there, is there, does there come a point when I'm like, especially rich?
Thanks very much for the call.
Good luck.
Is there a come a point where if they, they might replace a transmission
or any part, and if I'm close to the end, they're going to not give me
an extended warranty on that part.
Oh, there's some, if the warranty is three or 36,000 miles and you're at
the very last day of it, they'll put one in and say, OK, your warranty's over.
OK, we've got a new one.
And if this one breaks or if there's a problem with the one we just put in,
you're just out of luck.
Whereas at our shop, I've had a month, 12 month warranty
and I replaced something like within the last three days of a warranty.
And I don't give them a whole year, but I'm reasonable if it fails
within the next 30 days, if it doesn't fail, it's probably going to last
another right 10 years.
But if it fails right away, I'm like, I'm not going to leave them hanging.
It's help your day over.
Yeah, it's just wrong.
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Welcome back, everybody.
It's time to get back under the hood with our motor medics.
866-594-4150.
That's the number to reach us here at the end of the hood show.
Don't forget, if you miss an episode, you can find it wherever you get your
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And then if you join the hoodie fan club at underthehoodshow.com, you could.
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You could choose a hat or a shirt, whatever you choose.
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So congratulations to Ruben Scott from our friends over at Berkeley One Classics,
who are celebrating over 50 years of collector car coverage.
What would you, if, if every, what would you prefer they choose?
Whatever they want.
No, I know, but what would you t-shirt probably, huh?
I mean, I know, know whatever they want, but t-shirt.
I mean, that would be, I know it's, you know, it's all self-sustaining now
because they, they get them.
We have, I ship it out the whole thing.
Doesn't affect us anymore at all.
I mean, cost wise, doesn't matter because it's, it sustains itself.
It took us about three years to get to where we were.
And then when we got where we were, they, they sell them, they ship them.
It's all done for us.
So it, it just maintains itself now.
Okay.
Sure.
Sure.
It, though, probably is cheapest for us.
I mean, I know we don't notice.
We don't, it's one of those, it's like filling tank for me.
I got to fill the tank.
I can't, I don't care.
But I notice, you know, 865 don't shake your head at me, Doug.
He's over there disappointed in me.
I don't need that.
I know.
Let's go to Virginia and talk to Ray.
You're on the under the hood show.
Ray, what can we do for you?
Well, hello.
Nice to talk to you and thank you for taking my call.
I appreciate it.
Thank you.
I bet it's, it's, it's got to be 12, 14 years up and listening to you guys.
Just fantastic.
I appreciate all the work you do.
Thank you very much.
I have two questions I'd like to ask.
Okay.
My first question is on a 26 Yukon XL Denali with the 6.2.
I've been using Bearman B 12 in the tank of gas, but I'm getting ready to shift
over and use the 44 K, which I think is preferred, but I'd like to know what your
recommendations are and how often I should be using that.
Um, I really wouldn't use either, either one of them.
Um, but they're, they're both, they're both okay.
I mean, you're not going to be doing it.
What we use, I'm saying because in our shop, if a customer had it, that'd be fine,
but in our shop, what I'm using is the justice brothers as a professional service
cleaning system, um, when they're in and where we need to clean something.
But what I'm also using in our shop is CRC, the G2P, the guaranteed to pass system
cleaner and on those, um, it's about, about every six months on these.
You get the direct injected engines, um, as a cleaner, like I'd say as an ongoing,
not daily, but as an ongoing cleaner.
But what's more important is a GDI system cleaner.
And that is a product available from CRC as well, where you're doing a direct
injected gasoline engine service kit you've got in the tank, but you've also
got through the induction system to clean the back of those valves.
Cause you want to clean out the injector tips for sure, but you want to get the
carbon buildup reduced and cleaned out from the backside of the valves because
that's going to disrupt airflow and cause all sorts of issues with your fuel
trims and things like that.
So you want the full service pouring it in the tank, no matter what brand you use,
as long as it's a decent cleaner will only clean the tip of the injector.
It won't clean the back of the valves or anything else.
So that's why when we talk about like the CRC direct injection kit, that's
the whole thing and you could do that at home or you could do it at a shop.
And to go back, those are the Berryman's.
They're fine.
Fine.
Yeah.
Yeah.
They're fine.
In this case, with this 26, you would want to make sure you do the GDI.
Yeah.
You want to use a GDI kit, whatever you choose, it's got to be a GDI kit and
clean that system to keep it clean.
I've got the same model engine and I use that about every six months to keep it clean.
All right, Ray, I answered that question.
That it certainly does.
My second one is on another car.
I think it qualifies as a, a classic.
It's a 71.
We'll be the judge of that, Ray.
We're professionals.
You just ask your question.
All right, I'm with you.
Sub-Burkely.
71.
I'm just getting ready to replace the radial tires and the mag wheels on it and put the
standard steel wheels with the bias belt and tires on it.
And now I'm finding myself needing an alignment on the car or at least getting the alignment
checked.
The Ford service manual is calling to use all of these front alignment, the, the
alignment spacers on it.
And I can't find anybody that has any idea what I'm talking about.
That, uh, going back to the original on the, on this car, specifically, but any, any
car like this, that's old man stuff, right?
That's Ray.
That's not directed at you to go back to, if you got mag wheels on it, you, you decide
to do that when you're a young man.
And then when you're an old man, these are factory, the factory magnesium was what
you're talking about, right?
Well, they are, they're like the, I think so.
I think I had one tight magnesium, but the car was not built with that.
Oh, not built with it.
Okay.
I said, I'm talking about the ones they were built with originally.
So what I'm saying is we go from buying cool wheels to wanting originals.
Oh, yeah.
Right.
I mean, not me, but yeah, I got your point there, Chris, but, uh, yeah.
So if you want to align this vehicle, uh, ooh, you know, they stopped, they
stopped using the type of alignment spacers you're talking about.
Ooh, 80, seven ish, something like that.
Then they went to something else, but they're available everywhere.
We know a guy, we know a guy.
I would bet you could, you can go to Amazon and probably pick up a pack of a
hundred for on the cheap, you know, I mean, the alignment spacer, basically what
it is, is a piece of metal, um, that is, looks like a fork and it fits in the
bolt, you unbolt the bolt that holds the control arm on and you drop them in
between there and the frame and they come in, in different thicknesses.
I just pulled up Amazon on my phone real quick.
You can get a hundred and 52 pieces of all the sizes you want for 15 bucks with
free shipping.
So they look like that.
Chris, a little fork.
Yeah.
So perfect example.
Um, but he's also now got, do you figure one and they can align that if their
machine goes back that old, if it doesn't, you need to find an old fashioned
alignment guy that we've got a guy in our area that's been doing it since like
the sixties and he gets a tape measure out, a can of spray paint and he aligns
it and that's the way they can do it.
The machines, most of them will go back to the sixties.
Um, some of them won't though, but most of the, most of the good alignment
machines will go back that far.
But if it doesn't, you've got it, you've got it in a different place.
I do not know.
And it's very likely that the Ford machines don't go back that far.
Occasionally you will see, you know, like, let's say a Ford garage, we'll pick
on them today.
They'll say, Oh, we'll work on anything you bring it in.
We'll work on your car, your Ford car.
I guarantee you, if I pull my Model T into that place and say, change the
oil, they'll refuse me.
They'll say, no, we're not going to change your oil or we're going to say, no,
we're not going to put, we're not going to tune it up because they don't know
how to do it.
Their books don't show it.
Their texts are not trained on it.
They might not even know how to drive it.
Um, it's sure, you know, it's a, it's just one of those things as you've got
it as a company, you have to look and say, how many years do we want to go
back and realistically service cars we sell?
And that's probably 20.
You know, we'll, we'll work on some things that are 20, maybe even 25 years
old, but you get much older than that.
A lot of people are doing their own work, not bringing it in, but the, this
alignment should be able to be done.
And if you find the shop that can do the alignment, they're going to have those
spacers on the shelf for sure.
Um, they were used and looking.
All right.
Stay right where you are, Ray.
They were used in, in everything.
I know what color it is.
I do too.
Say it on 3123
Gold.
What color is it, Ray?
Long, bright blue metallic.
Oh, oh, I don't know if I don't, if that's, is that an original color?
The car is an original condition.
It's original color though, not repainted to different color.
Yeah.
Okay.
Cause I can't remember seeing a blue one.
I've, I've seen a lot of colors up in the picture, but you just don't see
those on the road anymore.
I have not seen one on the road up here in probably 20 years that I can remember.
Trying to think the last one I saw was gold.
I know that stay right there, Ray.
866594415
Oh, that's a definitely a Berkeley classic 71 cougar.
Oh yeah.
And the convertible, there were a lot of convertibles made in that year.
They made those up through, uh, you got 73, the big body car.
Convertibles, lots of, lots and lots of convertibles.
Those all leak in the, no, did they hold up over the years?
Yeah.
I mean, you could put new tops on them and stuff, but they were, they were good.
They were good cars.
Um, a lot of things that were, I won't even call them a fad.
They were people really liked them.
Convertibles, those were huge and now convertibles are more hardtop
convertibles and they just don't leak really.
Now the tea tops though, that was a fad that was used.
Well, it was a staple, but it was also a fad because it went away
because they had problems with them leaking and they get stolen a lot.
I just remember when it was, you could bring your car in and get a, uh,
sunroof for $99 or cut tea tops in for 300.
But insurance companies absolutely hated and fought against tea tops because
they were one of the number one items to be stolen because people would steal them.
And that meant you needed to buy some, right?
So somebody had some stolen ones to sell you.
So they kept, it was self fulfilling.
Yeah, they'd take them and then they'd sell them and maybe you'd sell them back to you.
Let's go to Oklahoma and talk to Steven.
You're on the end of the hood show.
Steven, what can we do for you?
Hey, long time listener, first time caller.
Thanks.
Uh, so I have a 2016 Acura MDX.
Started out as a break job and it already had one stud broken off
and I broke another stud off, which led to front wheel bearing replacement.
Uh, I got that done and the wheel speed sensor was not registering.
So I changed out the sensor and it still isn't registering.
I've got a APS scanner that comes and it'll do the individual wheels and it's just not.
Which wheel is it?
Uh, front driver.
Front drivers.
Okay.
And that one has a 16 Acura.
That's got a completely sealed hub on it, doesn't it?
With a sensor bolted to the hub or is a sensor in the, in the, it is in the hub.
Okay.
If it's in the hub, but it's not a little 10 millimeter.
Yep.
Pulled it out.
10 millimeter bolt.
It's two things are possible here.
When you replace the sensor, the sensor had what, a two foot wire on it?
Uh, yeah.
And I have, I checked the old one and the one on the passenger side with the meter and they all,
the new one and the other two all owned out about the same values.
Okay.
Then it's, it's probably in the hub then you probably got some trash in that hub or you've
got a broken tooth or a cracked tone wheel inside of the hub.
It's not picking it up.
So it's not able to read the hub.
But if you put a sensor in it and your sensors are, are reading well and you're not getting
an open circuit code from the ABS system, the module, um, saying that you've got to disconnect.
And I've changed a bunch of actuals.
I'm pretty, uh, state-screw mechanic.
Work a part of my life.
And there's not like, you know, a lot of times it's overcarved.
That's no wheels with little notches.
Right.
I can't find any of that.
Are those the, uh, magnetic pickup?
They got a little ceramic magnet in them.
Yeah.
So what, what you would do is you look at the data and you spin that wheel and see if it shows
that it's reading anything or you can use a meter on it and see, see if you get anything at all.
But I, I'd likely get there.
They're interchangeable left or right.
So you could swap them.
It's a lot of work, but you could swap them and see if it follows the, the signal follows the,
the problem.
Or you could go down and buy, but you could buy a new hub and with a sensor that'll come with a
sensor, plug it in and look at the data on the scanner, just turn the, turn the key on and read
the skin and spin the hub by hand and see if you get a reading.
If you get a reading from the new hub and sensor, but you don't from the old one,
by spinning it by hand, then you got to put, put that hub on.
I'll bet something's wrong inside of the hub.
It's probably cracked and broken.
Steven, thanks very much for the call.
Good luck.
866-594-4150.
That's the number to reach us here at the under the hood show.
What has caught your attention?
Something that caught my attention just recently was I saw a Ford recall, uh, and it was on
a certain month and it was, I feel kind of bad even say anything.
It's on 4,000 vehicles over like a five year period.
So it's a specific, obviously it's a specific thing that they know they're going at.
Another one for 450,000 right now.
So this one for 4,000, it almost seems like we, they're going to contact the,
they might actually just call all of those people in person.
I mean, cause you're right.
When you're dealing with a 100000 or a million, the economy of scale is so different.
And this one was just like specific models of specific years of specific cars.
And it's not, it's like when we have the Bugatti recall that's only for two cars.
Well, they, I'm sure they're going, don't publish it.
It's not a story.
Why, why do you want to do that?
We already talked to the guy, just drive over there.
Wouldn't it be cheaper to drive over there than to publish it?
Yeah, just go to their house flying.
I mean, Hey, I brought the doorknob for you.
Oh, Bugatti had to recall their entire sales for this month.
Yeah, it was two cars.
They were 4 million each and they fixed them.
That's because the media makes their money off of what we want to hear.
I can't vote.
That's ridiculous.
The media is great.
New sales, right?
If it doesn't sell, they didn't make any money.
That's right.
It wouldn't be a business.
Leads it leads.
What, what's caught your attention?
I just, just the sheer number of recalls and the number of them that don't get done.
I know when there's a recall on a car, when it comes into my shop
and you give me your license number and I put it in, boom, the Vin comes up
and then the Vin says active recall and I look at it and I see that's 12 years old
or 15 years old and you never had the recall done.
But it's still there because it's something.
Why are you looking at me?
Well, I don't know.
Years are gone though.
You sold your cars that had those.
No, one, they just stopped saying.
One of these GM has one for headlights and Ford does too.
Daytime running lights that never shut off at night.
Why do you need daytime running lights that work at night?
Here's what happens.
You think you're getting brighter lights because you've got these daytime running
lights, the big white ring that glares and blinds people and your headlights.
What that does, it, it doesn't project out.
It, it's made to illuminate your headlights themselves and your vehicle for safety.
So you get a brighter glare right in front of you.
But down the road, you can't see.
So you will see better if those are turned off.
Plus you won't blind the other people.
If you're looking out a dark window at your house at night, it's dark in your house
and you're looking out onto the street and all you can see is people moving around,
whatever, trying to break into your car, depending on where you live in.
Because it's pretty dark.
You got some moonlight.
You can see, right?
What would happen if you took a flashlight and put it right in front of your face,
shining straight up or three or four?
You're, you're going to reduce your visibility down the road or outside
because you've got that glare right there.
You, you want that shut off.
That's why high beams go down the road and low beams are illuminating right in front of you.
You want to see further.
If you light up what's right in front of you, you don't, you don't see as well.
So there's some of those recalls that you should pay attention to and it would benefit you and
they're always free.
And the other thing is too, and this is, this is what it really, I mean,
it used to be, it seems like there's a lot more recalls now.
And the reason there are a lot more recalls now is because I saw the article about the
4,000 cars in the Detroit free press because that showed up on my feed.
I used to deliver that on my bike.
Right.
I wouldn't have known about that at any point.
That I delivered it on my bike.
Yeah.
I wouldn't have known about that recall at any point in history previous to four years ago.
Right.
That's why there seems like there's so much more.
They, they always were out there.
If, but now I see, oh, the Toyota has another why.
And we won't see them in less, because I get motor trained.
They're fillers.
I call those fillers when the, when the big news stories are in between, you have the same thing
like right now we're in a, I knew that there wasn't a lot going on.
I didn't even have to look because the news I was hearing was local stuff.
You know, hey, did you hear the baseball?
Did you hear about this local event that happened instead of
leading off with the giant ones?
Or in your feed, you'll see that there was a recall.
And then when you click on it, it was four weeks ago.
It's just that your feed is recycling.
You finally saw it because the other stuff was in front of it.
Let's talk to Bob.
Bob, you're on the end of the hood show.
What can we do for you?
Yeah, I've got a headlight issue in a 2018 Subaru Forester.
A driver side headlight has been burning out something terrible.
I went and just tried putting in an LED after a while.
It was just kind of, just kind of flashing.
Kind of looked on the web and the only thing I could figure out is somehow
they have to try to possibly clean out any corrosion that may have
occurred in there or replace some of the wiring.
What are your thoughts?
How easy is it to change the light bulb?
That's not very hard.
Okay, that's pretty simple.
That is, that was my, in the Prius, we had a problem with the headlight.
Just changed it.
But it was super easy to change and they were really affordable.
So I just put in new headlights every two months.
It sounds like he's got a voltage issue, Chris,
because if he's got an LED that flashes, it's usually a voltage issue.
And if he's got a factory one that a hyalogen that's burnt out,
they, they'll burn out with voltage issues.
So I would, I would measure voltage.
Now you have to measure the voltage with the bulb plugged in and operating.
Not if you unplug it, you're going to have great voltage.
But when it's under a load, you're going to have to measure it with the load on it and operating.
See what it is and compare it side to side.
Look at the left, look at the right.
If you've got 13.1 volts on the right and you've got, you know,
11.6 on the left or something more, more or less, it's,
you got to figure out what's going on.
And it could be in the socket.
There's a lot of pigtail connectors sold to repair those ends.
And that was my issue with the pigtail.
Could be in the fuse box.
Could be in the relay.
It could be many things.
But like on your car, Chris, you had to replace that pigtail socket
and the bulb and then all of a sudden magically it was fixed.
You don't think that that little bit of change makes that difference.
You know, and the other thing is you get corrosion there.
That's why we use the CRC dielectric grease.
Yeah.
It's like what you use this for.
It's like, well, you use it in light sockets to keep moisture out
and keep the fixture operating properly.
Does that help you?
Does that help you out there, Bob?
Oh, yeah.
I'll do what I can do.
Is that, is that a change bulb?
That, that would, it goes in the preset.
That was easy.
So especially the one side I was all fine with buying them in bulk
and they sold them in bulk, by the way.
If you're headlight, if there's somebody that sells them in a six pack,
you know, it's like Christmas bulbs or something.
Yeah, exactly.
Is that something on a Subaru 2018?
Can anybody fix that?
Or is he going to be best served by taking it?
I think anybody, you'll be able to.
Dependent shop, yeah.
Trouble shoot that and see what it is.
All right.
There we go.
Gary, did we have time for Gary?
Doug, we have 30 seconds.
Is that not going to be long enough?
After show.
Yeah, it's going to have to.
We'll just pretend I didn't, pretend I didn't say anything at all.
It'll be.
I'm a professional.
Nope.
I've been doing this for years.
Whoops.
That'll do it for this hour.
Are they under the hood show?
Until next time, you can find us at underthehoodshow.com.
Don't forget, you can watch the show on our YouTube channel
and Facebook, but those are going away.
Like, I mean, they're, after a few days, they go away
and a few weeks, they delete them all.
So just go to YouTube and watch those.
Hey, did you know that?
I didn't pay attention.
See you next week on the under the hood show.
Thanks for listening.
Taking our videos.
All right.
We're, that'll, we're done.
Gary didn't stay.
Gary's gone.
I, yeah, he's heard me and he was like, this, this show stinks.
Yeah.
He heard the music and said, oh, they're done.
Yeah.
No, no, no.
Stay around.
Stay.
All right.
But now don't.
Unless he's watching YouTube, now he's going to call right back.
Yeah.
Don't now though.
And then we're going to.
Because we're done.
I'm, we're not going to think.
Okay.
See you.
Bye.
Thanks everybody.
With Russ Evans.
This is Shannon Orts from thanking you for tuning into the North's Under the Hood show.
Have a great day and remember PTLA.
The opinions heard on this program based on the many years of experience of Russ and Shannon
are offered for entertainment value only and as a guide to your repair needs.
No claim to repair or cause is given or implied.
Always consult with your own certified technician and follow all safety procedures
before attempting any repair to be a part of the show.
Call 866-594-4150.
Find out more by visiting Underthehoodshow.com.
Under the Hood is produced by Prairie House Productions.
All content is the property of Nordstroms Automotive Incorporated
and may not be used without our permission.
Copyright Nordstroms Automotive, Inc.
About this episode
A live call-in episode that jumps between practical diagnostics and real-world repair decisions. The experts explain why start-stop can shut down when the check engine light is on, then recommend scanning for codes. They cover EVAP failure points, fuel additive cautions, and GDI cleaner requirements. Later, transmission and wheel-speed sensor issues get detailed treatment—plus guidance on headlight failures, including measuring voltage under load and fixing corroded connectors. The show also touches recalls via VIN checks and ends with classic-car alignment advice using spacers.
