Under The Hood Your Live Car Questions Answered Now
Under The Hood show
Under The Hood Your Live Car Questions Answered Now Under The Hood show · Jun 24, 2026
Under The Hood Your Live Car Questions Answered Now

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Under The Hood Your Live Car Questions Answered Now
Ford Mustang
Car

Ford Mustang

The Ford Mustang is a sporty Ford car, usually with a powerful engine. The podcast mentions one with a bigger V8 engine, and how it was fun to drive. People talk about Mustangs because they’re built for performance and driving enjoyment.

Dodge Challenger
Car

Dodge Challenger

A Dodge Challenger is a big, V8-powered muscle car. Here, the discussion is about a 2019 version and a problem people can have with the engine’s valve lifters.

Term

full synthetic

Full synthetic is a higher-end type of engine oil. The host is using it and changing it more often, hoping it will help protect the engine’s moving parts.

Term

torque

Torque is the engine’s twisting force. More torque usually means the car feels stronger when you accelerate, especially from lower speeds.

Place

drag strip

A drag strip is a track where cars race in a straight line. It’s where you do quick acceleration runs, which can be harder on the car than normal driving.

Term

lifter collapse

A lifter is part of the engine that helps open and close the valves correctly. “Lifter collapse” means that part can fail to work as intended, which can cause engine problems if it isn’t fixed.

Term

hydraulic lifter

A hydraulic lifter is an engine part that uses oil pressure to keep the valve timing/clearance correct. Since it depends on oil, good oil and regular changes can help prevent lifter problems.

Term

MDS

MDS is a system that can shut off some cylinders when you don’t need full power, to save fuel. The question here is whether turning that system off (deleting MDS) helps with lifter problems.

Term

cam

The camshaft controls when the engine’s valves open and close. Changing it can change how the engine makes power, and in this segment it’s mentioned as part of fixing lifter problems.

Term

8-speed automatic

An 8-speed automatic is a car transmission that has eight gears and shifts by itself. Here it’s mentioned because it affects how the car responds when you change engine parts.

Term

headers

Headers are upgraded exhaust parts that help gases leave the engine more easily. People add them to make the car sound better and sometimes feel stronger.

Term

stall converter

On an automatic, the torque converter helps the engine and transmission work together. A “stall converter” is tuned to let the engine rev higher for launches, which can make the car feel quicker with certain engine upgrades.

Pontiac Firebird
Car

Pontiac Firebird

The Pontiac Firebird is a classic muscle car. The podcast talks about how it sounds and suggests that if you like the Firebird’s sound, you’ll like the setup being discussed. It’s mainly about the driving experience and exhaust tone.

Term

lifter collapsing

This means a part that helps open and close the engine’s valves isn’t working right. When it “collapses,” the engine can run badly and may get damaged if it’s not fixed.

Term

electric cutout system

An electric cutout is a valve in the exhaust that can open or close. When it opens, the car can sound louder because exhaust can escape differently.

Company

Dakota Digital

Dakota Digital is an aftermarket company that makes electronics for cars. Here, they’re mentioned because they helped develop an exhaust “cutout” control system.

Chevrolet Camaro
Car

Chevrolet Camaro

The Chevrolet Camaro is a sporty, performance car. It’s often discussed alongside other muscle cars because it’s made to be fast and fun to drive. In the podcast, it’s mentioned in that same comparison context.

Concept

additives

Additives are liquids you pour into the car (like fuel or engine treatments) hoping to improve how it runs. They might help some symptoms, but they can’t fix a real mechanical problem by themselves.

Term

ECM opened up to tune

The ECM is the car’s computer. “Opened up to tune” means it can be reprogrammed so a shop can adjust how the engine runs for mods like a cam or exhaust.

Term

Wildcat tunes

A “tune” is the computer settings for the engine. “Wildcat tunes” here means random or generic tune files that might not fit your exact car and mods, which can lead to problems.

Term

computer

Here, “computer” means the car’s engine computer. Some newer cars lock that computer so you can’t change it unless it’s unlocked first.

Term

HP tuners

HP Tuners is a tool that lets shops change how a car’s computer behaves. It can be used to adjust settings, but many newer cars need special unlocking before you can do it.

Term

exhaust cutouts

Exhaust cutouts are switches in the exhaust that can make the car louder. When they open, the muffler’s effect is reduced, so you hear more engine sound.

Chevrolet Corvette
Car

Chevrolet Corvette

The Chevrolet Corvette is a sports car built for strong performance. The podcast mentions it because you can change how it sounds depending on what you’re doing. That makes it stand out for people who care about the exhaust sound.

Chevrolet Silverado
Car

Chevrolet Silverado

The host mentions Chevrolet Silverado trucks with factory exhaust cutouts. The idea is that the cutout is integrated into the muffler so the truck can go from muffled to louder exhaust sound.

Ford Bronco
Car

Ford Bronco

The Ford Bronco is an SUV made for rough roads and off-roading. The podcast talks about it changing from a quieter exhaust to a louder one. That’s something people notice because it affects how the vehicle sounds while driving.

Brand

Optima

Optima is a battery brand. In this call, they’re talking about a battery maintainer—something that keeps a car battery healthy when the vehicle isn’t used constantly.

Company

Deltron

Deltron is the name of a company that made a battery-charging/maintenance unit. The caller is saying their department used a Deltron unit before switching to other options.

Term

deep cycle batteries

Deep-cycle batteries are made for repeated “use and recharge” over time. They’re better than regular car batteries for situations where a vehicle sits and still powers accessories.

Term

float that thing

“Floating” a battery means keeping it gently charged at the right level. It helps the battery stay ready when the car isn’t being driven much.

Term

110 volts

“110 volts” is regular home electricity. They’re talking about using a normal wall plug to keep the battery charged instead of attaching clamps each time.

Term

battery tenders

A battery tender is a device you plug in to keep a car battery charged while the car sits. It’s meant to prevent the battery from slowly going flat over time.

Term

battery maintainer

A battery maintainer is a device you plug into a car battery to keep it charged when the car isn’t being driven. It’s made to be left connected for a long time without damaging the battery.

Term

CAN bus networks

CAN bus is the car’s internal wiring network that different computers use to communicate. When those computers wake up, they can draw power and drain the battery if the car isn’t used.

07 Tahoe
Car

07 Tahoe

The Chevrolet Tahoe is a big SUV. The host is pointing to a 2007 Tahoe because newer GM cars around then started using more computer networks, which can pull power from the battery.

BMW E88
Car

BMW E88

The BMW 1 Series is a small luxury car. The podcast mentions it while discussing whether certain fuel blends with high ethanol levels (like E-88) are okay to use. The main issue is whether the car is designed to handle that fuel.

Term

E-85

E-85 is a gas/ethanol mix. The “85” means it contains a lot of ethanol (up to 85%), so it’s not the same thing as an octane rating.

Term

octane

Octane is a rating that helps prevent engine knocking. Higher octane generally means the fuel is better at resisting knock, but it’s not the same as how much ethanol is in the fuel.

Term

vapor lock

Vapor lock happens when fuel boils or turns to gas in the fuel system, so the engine doesn’t get the right amount of liquid fuel. It’s more likely when fuel pressure is too low or the fuel system is worn or clogged.

Term

fuel pressure

Fuel pressure is how strongly the fuel pump pushes fuel through the lines to the engine. If it gets too low, the engine may run poorly and issues like vapor lock become more likely.

Jeep Compass
Car

Jeep Compass

The Jeep Compass is a compact SUV. The podcast talks about fuel octane, like using 87, which is the standard fuel rating for many vehicles. The point is to use the fuel type the car is designed for.

Term

E-15

E-15 means the gas has ethanol mixed in—about 15%. If your car isn’t built to handle that much ethanol, it can run poorly.

BMW E30
Car

BMW E30

The BMW 3 Series is a luxury car (a sedan) made for everyday driving with a sporty feel. The podcast mentions it while talking about fuel types, especially fuels with different ethanol levels like E-15 or E-30. The key point is whether the car can use those fuels.

Term

check engine light

The check engine light is a warning that something in the engine system isn’t right. If the fuel blend doesn’t agree with the engine, it can trigger this light.

Term

flex fuel vehicle

A flex-fuel vehicle can handle different ethanol levels in the gas. If you have one, it can adjust to fuels like E-85; if you don’t, using E-85 can make the car run badly.

Car

350 Chevy motor

“350 Chevy” means a Chevrolet V8 engine with about 350 cubic inches of displacement. If it hesitates or loses power when you start moving, it’s often related to ignition or the carburetor setup.

72 Chevy pickup
Car

72 Chevy pickup

This is a 1972 Chevrolet pickup truck. The conversation is about a problem with how it runs when you accelerate, even after rebuilding parts like the carburetor and ignition components.

Term

vacuum advance

Vacuum advance changes the timing of the spark based on how much vacuum the engine is making. If it’s not working correctly, the engine may hesitate when you accelerate.

Term

distributor

The distributor is part of the ignition system that sends spark to the cylinders in the correct order. If it’s not set up right, the engine can stumble when you take off.

Term

points

“Points” are an older ignition system part that helps control when the spark happens. If they’re worn or not adjusted right, the engine can act like it’s skipping or stumbling.

Term

carburetor rebuild

A carburetor rebuild is when the carburetor is taken apart and serviced so it mixes fuel and air correctly. If it’s not tuned right afterward, the truck can stumble when you accelerate.

Term

valve covers

Valve covers are the top covers over the engine’s valve area. Taking them off lets you look at parts like lifters to see if something is off.

Brand

Berkeley One Classics

Berkeley One Classics is an insurance company that focuses on classic or collector cars. They’re sponsoring the show, and the host is pointing you to them for that kind of coverage.

Term

collector car insurance

Collector car insurance is insurance made for classic or hobby cars. It usually treats the car’s value differently than a normal daily-driver policy.

Brand

car dash part.com

car dash part.com is a website where you can look up used car parts. It’s meant to help you find parts that fit your specific car.

Brand

road ready wheels

Road Ready Wheels sells replacement wheel sets for cars. The pitch is that they’re made to fit like the original wheels and help fix problems like slow air leaks.

Term

snow tires

Snow tires are tires designed for winter weather. They help with grip in snow and cold, and the host is suggesting using them so you don’t damage your nicer summer wheels.

Term

OEM aluminum wheels

OEM aluminum wheels are replacement wheels that match what the car originally came with, just made to fit your model. They’re aluminum, and the host says they’re cheaper than many aftermarket options.

Term

TPM sensors

TPM sensors are tire-pressure monitoring sensors that measure tire pressure and alert the driver when pressure is low. Many modern cars require the sensors to be compatible with the vehicle’s system, so wheel swaps must account for them.

Term

high energy ignition

“High energy ignition” means the car’s spark is made stronger than stock. That can help the engine start easier and run more reliably, especially on older ignition systems.

Term

condenser

A “condenser” is an electrical part that helps the ignition system work smoothly with the older points. It helps prevent problems like weak or inconsistent sparks.

Term

HEI

HEI is an older-style ignition upgrade used on some GM engines. It helps the spark be stronger and more consistent, which can fix problems like misfires or weak ignition.

Term

four barrel vehicle

A “four barrel” refers to a four-barrel carburetor (or four-barrel throttle body) setup that uses multiple throttle bores to supply fuel/air. It can affect how the engine transitions from light throttle to heavier acceleration, which is relevant when diagnosing flutter or hesitation.

Term

flutter upon acceleration

“Flutter upon acceleration” is a drivability symptom where engine speed or combustion feels unstable as you apply throttle. It’s often caused by ignition issues, fuel/air mixture problems, or vacuum leaks rather than a purely mechanical failure.

Term

zinc every oil change

“Zinc” is an additive in oil that helps protect the engine’s moving parts from wear. Some older engines need it more than newer ones.

Term

vacuum leaks

A vacuum leak is when air gets into the engine where it shouldn’t. That can make the engine run wrong and cause weird symptoms when you accelerate.

Term

low ignition voltage

Low ignition voltage means the ignition system isn’t getting enough electricity to make a strong spark. When that happens, the engine can stumble or act like it’s misfiring.

Term

dwell problem

Dwell is how long the ignition system is “charging” before it fires the spark. If it’s wrong, the spark can be weak and the engine may run poorly.

Term

top dead center

Top dead center (TDC) is a specific position in the engine where the piston is at its highest point. Timing is measured relative to this point when setting up the ignition.

Term

Pertronix

Pertronix makes an electronic ignition kit that replaces the old mechanical points. It’s meant to make starting and running more consistent without changing the whole distributor.

Land Rover Range Rover
Car

Land Rover Range Rover

The Land Rover Range Rover is a luxury SUV. The podcast mentions it while describing a simple step like removing a cap and accessing something under it. That suggests the discussion is about how to handle a routine check or maintenance task.

Term

high energy coil

A high energy coil makes a stronger spark than a basic ignition coil. Stronger spark can help the engine run more smoothly, especially if it’s misfiring or stumbling.

Term

resistor wire

Resistor wire is a wire with built-in resistance used in some older ignition systems. It helps keep the electrical current from being too high and damaging ignition parts.

Term

resistor coil

A resistor coil is a spark-coil design that includes built-in resistance. That resistance helps protect the ignition system, especially the older mechanical points.

Term

twin pump carburetor

It’s a carburetor setup that has two little fuel “pumps” to squirt extra gas when you press the gas pedal. The goal is to keep the engine from hesitating when you accelerate.

Term

secondaries

Secondaries are the “extra” part of the carburetor that only starts working when you’re asking for more power. If they open too soon or don’t deliver enough fuel, the engine can bog or shake.

Chevrolet Volt
Car

Chevrolet Volt

The Chevrolet Volt is a plug-in hybrid, so it can run on electricity and also has a gasoline engine. The podcast mentions checking voltage, which is a basic step when diagnosing electrical problems. It’s relevant because the Volt has important electrical components that need correct readings.

2020 Buick Envision
Car

2020 Buick Envision

The Buick Envision is a midsize SUV. In this call, the host is guessing it might be the source of a knocking noise the owner can’t find after checking tires and looking under the car.

Concept

road-speed noise

Road-speed noise is a sound that gets louder or changes as you drive faster. If it’s mostly tied to speed (and not just bumps), it can point to something like trim vibrating from airflow instead of a tire or suspension problem.

Part

windshield trim

Windshield trim is the plastic/rubber edging around your windshield. If it’s loose or cracked, the wind at higher speeds can make it rattle or buzz and sound like something else is wrong.

Honda Crv
Car

Honda Crv

A Honda CR-V is a common Honda SUV. Here it’s used as an example of how something simple—like trim on the windshield—can make a noise that sounds like it’s coming from the tires or suspension.

Term

painter's tape

Painter’s tape is a gentle tape you can peel off later. Here it’s suggested as a quick test: tape parts of the trim to see if the noise stops, helping you pinpoint the source.

Term

fender liners

Fender liners (also called splash guards) are plastic panels inside the wheel well that help protect the body from water, dirt, and debris. Loose or damaged liners can rattle and create noises that sound like deeper suspension problems, so they’re worth checking when diagnosing knocks and bangs.

Term

stress tested

Stress testing just means trying the car in a way that makes the problem happen again. The goal is to recreate the noise so you can find what part is causing it.

Part

left rear sway bar link

This is a small suspension link that helps keep the car from leaning too much. If it breaks, the rear suspension can clunk or bang over bumps because the parts can move and hit each other.

Term

all-wheel drive

All-wheel drive means power goes to more than just one set of wheels. Because of that, there are extra parts that can make noise, so it’s important to inspect the drivetrain and suspension together.

Term

amperage

Amperage is the amount of electricity flowing to the car. Starting needs a lot of electricity at once—if the connection is bad, the car can light up but still won’t crank.

Term

corrosion in a battery terminal

Battery terminal corrosion is gunk on the battery connection. It can stop enough electricity from reaching the starter, so the dash lights work but the car won’t start.

Term

ground

A ground is the electrical “return path” that lets electricity complete the circuit. If the ground connection is bad, the car may light up but still won’t start.

Term

stud bolted into the transmission

A stud is a metal post with threads. In this case it’s used to attach a cable to the transmission, and if it’s not installed correctly, the connection can be unreliable and the car may not start.

Term

voltmeter

A voltmeter is a tool that measures how much electricity (voltage) is present. It helps you find exactly where the electrical problem is happening.

Term

negative cable

The negative cable is the main wire that completes the circuit back to the battery. If it’s loose or corroded, the car can lose power when you try to start it.

Term

terminals

Terminals are the metal connection points where wires plug in or bolt down. If they’re dirty or corroded, electricity can’t flow consistently, and the car may act like it’s turning on and off.

Term

automatic transmission

An automatic transmission is the part of the car that shifts gears for you. You don’t have to use a clutch pedal, and the conversation here is about a Saturn that has had transmission trouble.

Concept

copy the Toyota mindset

This phrase means Saturn was trying to follow Toyota’s way of doing things—like building cars with a strong focus on consistent quality and efficiency. The host is saying Saturn was GM’s attempt to adopt that philosophy.

Saturn Vue
Car

Saturn Vue

A Saturn Vue is an SUV model. The host is basically saying that even if a car looks like it’s in decent shape, you can still have safety concerns when you see something wrong while it’s driving fast.

Part

control arm

The control arm is a metal link that helps hold the wheel in the right position. If it rusts through or comes loose, the wheel can move unpredictably, which is very dangerous.

Toyota Corolla
Car

Toyota Corolla

A Toyota Corolla is a very common everyday car. Here, the host is talking about a dangerous suspension problem—parts under the car were rusted and not properly attached, so the car could lose control.

Concept

inspection sticker

An inspection sticker is proof a vehicle passed a required safety/emissions inspection in its jurisdiction. The host claims that in Texas, some cars are being seen without inspection stickers, implying they may be operating with serious issues that should have been caught.

Part

ball joint

A ball joint is a small but critical joint that lets the suspension move while keeping the wheel pointed the right way. If it breaks, the wheel can suddenly shift and the car can crash.

Term

chassis inspection

A chassis inspection is a mechanic looking at the car’s main structure and underbody to make sure it’s still solid. It’s especially important for older cars because rust can weaken the parts that hold everything together.

Term

underbodies

The underbody is the bottom of the car. It gets hit by water and road salt, so rust can build up there and weaken the car even if the top looks okay.

Dodge Avenger
Car

Dodge Avenger

The Dodge Avenger is a car model that can rust as it gets older. Here, the host is pointing out rust on the front cradle area, which can make the suspension mounting unsafe.

Term

front cradle

The front cradle is like a sturdy mounting frame under the front of the car. If it rusts badly, the suspension parts may not be held securely and the car can become unsafe.

Ford Escape
Car

Ford Escape

The Ford Escape is an SUV that can rust over time. Here, the host is saying moisture can collect in certain spots and cause rust that weakens important mounting areas.

Term

rear frame

The rear frame is the strong metal structure under the back of the truck that holds everything together. If rust destroys it, the truck can become unsafe, especially when you tow something heavy.

Concept

used vehicle inspection

A used vehicle inspection is when a mechanic checks a used car before you buy it. It helps find serious issues like rust that could make the car unsafe.

Term

rocker panels

Rocker panels are the body panels along the lower sides of the car, between the front and rear doors. Surface rust here can be cosmetic, but rust that spreads into structural mounting areas can reduce safety.

Term

fender wells

Fender wells are the areas around the wheel openings. They get sprayed with road water and salt, so rust can build up there and sometimes spread to more important parts.

Lucid Air
Car

Lucid Air

The Lucid Air is an electric car, meaning it runs on a battery instead of gasoline. The podcast mentions it while talking about keeping the car’s systems working and what to do if something isn’t right. It’s part of a troubleshooting or maintenance conversation.

Place

northwood tack up in michigan

The host mentions Northwood in Michigan as part of the guest’s background. It’s a place reference, not a car or part.

Topic

high bank nationals

“High Bank Nationals” is the name of a dirt-track race event. The host is saying the guest is excited to attend it.

Term

salvage yards

A “salvage yard” is where damaged cars are taken apart so parts can be reused. The guest is saying they’ve seen a lot of those places.

Term

dirt track racing

“Dirt track racing” means races run on dirt instead of pavement. Cars handle differently on dirt, so the racing style can be more physical.

Topic

saturday night main event

The “Saturday Night Main Event” refers to the headline race of a dirt-track weekend. The host ties it to a large winner’s payout, emphasizing its importance compared with other races.

Topic

world of outlaws

“World of Outlaws” is a well-known dirt-racing organization/series. The host is saying the prize rules are set up so a local racer could win too.

Term

bumping

“Bumping” is when race cars touch each other to pass or fight for position. The host is saying the race will get very aggressive.

Topic

wreck your mother

“Wreck your mother” sounds like a loud dirt-racing chant or slogan. It’s meant to hype the chaos and intensity of the race.

Topic

auto manufacturer

An “auto manufacturer” is a company that makes cars. The host is saying one guest has experience working inside that kind of business.

Term

vin match pro

“VIN match pro” sounds like a tool/service that helps match a car’s VIN (its unique ID number) to the right information. The host is about to explain it.

Term

halogen

Halogen is one type of headlight bulb. It’s not the same as xenon/HID, so you can’t always swap parts without making sure they’re compatible.

Term

xenon

Xenon headlights use a different lighting system than halogen bulbs. The parts are usually not interchangeable, so matching the car’s original setup matters.

Term

standard

In this context, “standard” means a manual transmission. Manual vs automatic drivetrains can require different parts and hardware, so VIN/build-sheet matching helps ensure the correct transmission-related components are ordered.

Term

six cylinder

Six cylinder means the engine has six cylinders. Different engine setups can use different parts, so you need the right one for your exact car.

Term

eight cylinder

Eight cylinder means the engine has eight cylinders. Parts can differ between engine sizes, so matching the car’s original configuration helps avoid mistakes.

Term

crew cab

Crew cab is a truck cab style with more doors and more passenger space. Because it’s a different cab layout, some exterior parts won’t fit correctly if you order for the wrong version.

Term

mega cab

Mega Cab is a name for a bigger truck cab. Because the cab is larger, some parts and measurements won’t match smaller cab versions.

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