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How Is Your Car Doing? We Can Help Repair It With Live Advice

How Is Your Car Doing? We Can Help Repair It With Live Advice

Under The Hood show Dec 04, 2025 45 min
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About this episode

Listeners get live automotive advice as the hosts tackle various car issues, including a persistent P0171 code on a 1997 Pontiac Bonneville, a wobbling sound from a 2003 Toyota Corolla, and oil burning in a 2016 Volkswagen Jetta. The team discusses troubleshooting techniques, the importance of proper part replacement, and the nuances of older vehicles. They also share insights on brake problems, engine repairs, and the best practices for maintaining classic cars. The episode is filled with practical tips and real-life examples from callers seeking help.

Technical Too Afraid to Ask
Pontiac Bonneville
Bull-Doser (Public domain)
Car

Pontiac Bonneville

"I've got a 1997 Pontiac Bonneville. I've had the upper, lower and upper intake manifolds."

The Pontiac Bonneville is a large car made by the Pontiac brand. The 1997 version is known for being roomy and comfortable to drive.

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Part

O2 sensor

"I've changed the O2 sensor. I've changed the map sensor."

An O2 sensor checks how much oxygen is in the exhaust from the engine. It helps the car's computer make sure the engine runs efficiently and cleanly.

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Term

P0171 code

"They keep giving me a P0171 code where the car will race the engine, the codes, and then it will come back on pretty quick."

The P0171 code is a warning from the car's computer that says there's too much air and not enough fuel getting into the engine. This can cause the car to run poorly.

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Part

plenum

"The plenum, I heard, can go bad. I bought a new plenum, but they didn't put that on."

The plenum helps direct air into the engine. If it breaks, it can cause problems with how the engine runs.

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Term

intake manifold

"...went around the intake, see if there was any leaks spraying around it. Well, then if I push on that plastic piece that comes out of that plastic out of the plenum..."

The intake manifold is a part of the engine that helps get air into the engine. It's important for how well the engine runs.

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Term

brake booster

"...on that vacuum that comes from that brake booster."

The brake booster helps the brakes work better by making it easier to push the brake pedal. It uses air pressure to give you more stopping power.

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Term

lean codes

"And that'll throw a code for an oxygen sensor pretty quickly. You can get lean codes that way."

Lean codes are warnings from the car's computer that say there's too much air compared to fuel in the engine. This can cause the engine to run poorly.

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Company

Dorman

"I mean, we use a ton of Dorman products intakes in our shop. We replace these 3-8s, not as many on the 3-8s as we used to, because we don't see the cars as many."

Dorman makes replacement car parts that can be used instead of the original parts. They are popular for fixing cars when the original parts are broken or hard to find.

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Part

PCV valve

"Well, when we get them in, we put a Dorman products intake on it, and I have not had a problem with that. What you do have to make sure of, though, is that you pull that little PCV valve cap off"

The PCV valve is a small part in the engine that helps control gases and keeps the engine running cleanly. It helps reduce pollution from the car.

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Term

intake leak

"An intake leak that's, let's say, you've got an eighth inch hose on an intake. This one doesn't have that."

An intake leak happens when air gets into the engine in a way that the engine computer doesn't expect. This can cause problems with how the engine runs.

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Term

mass airflow sensor

"It needs to meter all that air, either with a map sensor, manifold air pressure sensor, or a mass airflow sensor."

A mass airflow sensor is a part that checks how much air is coming into the engine. This helps the engine know how much fuel to use for the best performance.

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Term

manifold absolute pressure sensor

"It needs to meter all that air, either with a map sensor, manifold air pressure sensor, or a mass airflow sensor."

A manifold absolute pressure sensor checks the pressure in the engine's intake area. This helps the engine know how much air is available to mix with fuel for better performance.

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Toyota Corolla
TTTNIS (CC0)
Car

Toyota Corolla

"Yeah, I got a 2003 Toyota Corolla recently getting like a wobbling sound on the passenger side wheel when I get up around 20 miles an hour."

The Toyota Corolla is a small car that is popular for being dependable and economical. The 2003 version is one of many models made over the years.

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Part

wheel bearing

"It sounds like a wheel bearing. Does it? Wheel bearing, okay. It sounds like a wheel bearing to me."

A wheel bearing helps your car's wheels spin easily. It's like a small part that lets the wheels turn without getting stuck, making your ride smoother and safer.

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Part

knuckle

"...they'll buy the whole knuckle with a bearing attached and say I'm buying this knuckle because I need a good bearing. And they'll say, oh, so they'll spin it..."

The knuckle is a part of the car's suspension that helps connect the wheel to the rest of the car. It allows the wheel to turn and supports the weight of the vehicle.

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Part

pre-pressed axle assembly

"...you can buy loaded knuckle assemblies and pre-pressed axle assemblies with bearings on them. That's important."

A pre-pressed axle assembly is a car part that has the bearings already put in place, making it easier to install when fixing the car's axle.

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Term

rotate your tires

"But also, don't be afraid to try to rotate your tires and see if the noise moves. Yes, because if you have tires that are feather edged and cupped..."

Rotating your tires means moving them around to different spots on your car. This helps them wear evenly and last longer.

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Term

feather edged and cupped

"...if you have tires that are feather edged and cupped, you can feel it when you run your hand over the tire. It's don't put a wheel bearing in it because you gotta get the tires smooth first."

Feather edged means the tire tread is wearing down unevenly, making it feel sharp. Cupped tires have dips or waves in them, which can cause noise and make driving less smooth.

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Term

carbureted car

"Unless it's an old one. If it's a carbureted car, yeah, I'd probably do it."

A carbureted car is an older type of vehicle that uses a device called a carburetor to mix fuel and air for the engine. These cars can sometimes handle different types of oil better than newer cars.

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Term

catalytic converter

"...because it gets into the catalytic converter and causes problem. But if you got like an older classic car..."

The catalytic converter is a part of the car that helps clean the air by changing harmful gases from the engine into less harmful ones before they leave the car.

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Tesla
Ralf Roletschek (GFDL 1.2)
Car

Tesla

"...He shipped his Tesla all the way to me because nobody out there would touch it."

Tesla is a company that makes electric cars. They are known for being very advanced and environmentally friendly.

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Part

battery

"...All the batteries are died and nobody will touch it."

A battery is what powers an electric car. If the battery is dead, the car won't work at all.

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Tesla Model X
Alexander Migl (CC BY-SA 4.0)
Car

Tesla Model X

"I saw your Facebook post of the car toaster dropping off the Tesla Model X from New York to work on."

The Tesla Model X is an electric SUV made by Tesla. It's known for its unique doors that open upwards and has a lot of high-tech features.

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Tesla Model
Alexander Migl (CC BY-SA 4.0)
Car

Tesla Model

"...Facebook post of the car toaster dropping off the Tesla Model X from New York to work on. I never made the conn..."
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Ram 1500
Kevauto (CC BY-SA 4.0)
Car

Ram 1500

"I have a 2003 Ram 1500, which is 4.7 with 291,000 miles on it."

The Ram 1500 is a large truck that can be used for carrying heavy loads or towing. The 2003 version is known for being reliable and has many features for comfort and utility.

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Part

spark plugs

"Because the changing of spark plugs and wires and caps and things should not ever affect your idle"

Spark plugs are small parts in the engine that help start the car by creating a spark. If they are worn out, the car might not run well or could have trouble starting.

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Part

coil pack

"No, it was the coil pack. The coil pack?"

A coil pack is a part of the car's ignition system that helps start the engine by providing the necessary electrical spark. It's important for making sure the engine runs smoothly.

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Term

coil-on plug

"No, a 3-4-7 would be a coil-on plug. Yep."

In a coil-on-plug system, each spark plug has its own coil, which helps the engine run better and use fuel more efficiently. It's a modern way to ignite the fuel in the engine.

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Part

idle air control motor

"And let's say it had an idle air control motor fail, just coincidence, by touching it, that can happen."

The idle air control motor helps keep the engine running smoothly when it's not accelerating. It controls how much air gets into the engine to keep the idle speed steady.

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Toyota Camry
S5A-0043 (CC BY 2.0)
Car

Toyota Camry

"Yeah, hi. So I have a 2006 Toyota Camry. It has about 93,000 miles on it."

The Toyota Camry is a popular car that many people like because it's dependable and gets good gas mileage. It's a comfortable car for everyday driving and is often chosen by families.

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Car

Ford Super

"...k you for listening. I'm calling regarding a 2001 Ford Super Duty with the 7.3 liter power stroke."

The Ford Super Duty Lariat Tremor is a big truck that can handle heavy loads and rough terrain. It's great for people who need to tow trailers or drive off the beaten path.

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Volkswagen Jetta
Alexander Migl (CC BY-SA 4.0)
Car

Volkswagen Jetta

"...ht be a good place to do major engine repair on a Jetta, on a 16 Jetta. And they should be able to help y..."

The Volkswagen Jetta is a small car that many people enjoy driving because it feels sporty and has a nice interior. It's a good option for those who want a stylish car that’s easy to park and use every day.

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8 cars featured

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