The Car Repair Experts Answering Any Car Question You Throw At Us

The GMC Sierra 1500 is a full-size pickup truck, and in 2014 it uses modern anti-lock braking hardware as part of its ABS system. In this segment, the caller says they’re having issues with ABS, which is the vehicle’s wheel-speed-based braking safety feature.

The GMC Sierra EV is an electric version of the Sierra pickup line, built to deliver the utility of a truck with electric power. In the podcast, the mention is tied to a customer with a 2014 GMC Sierra 1500 who’s having ABS issues, so the conversation is likely about braking system diagnostics and repair. That makes it relevant because ABS problems can affect safety and how the truck behaves during hard braking.

A wheel speed sensor measures how fast each wheel is rotating and sends that data to the car’s electronics. If one sensor fails or its signal drops out, the car may not know the correct wheel speed and can trigger ABS behavior or warnings.

In this context, a scanner is an OBD diagnostic tool that reads fault codes and live sensor data from the car’s computer. It helps identify which specific wheel-speed sensor is not reading and when the signal drops out.

A tone ring (also called a reluctor ring) is a toothed metal ring on or near the wheel hub that works with the wheel speed sensor. If the tone ring is weak/damaged or the magnet is weak, the sensor signal can drop out at low RPM.

RPM means revolutions per minute, describing how fast the wheel (or engine component) is spinning. The speaker notes that a weak tone ring or magnet can cause the sensor to drop out specifically at low RPM (slow wheel rotation).

ABS (anti-lock braking system) prevents wheel lockup during hard braking by modulating brake pressure. If a wheel speed sensor signal drops out, the ABS can activate unexpectedly, causing the brake pedal feel to change.

Four wheel drive (4WD) powers all four wheels, so when the vehicle is raised and running, all wheel speed sensors are actively being read. The host suggests using 4WD on a hoist to see which wheel speed drops out.

A hoist is a shop lift used to raise a vehicle safely so technicians can inspect and test components underneath. In this segment, it’s used to spin wheels and observe which wheel speed sensor signal drops out.

Heat-shrink connectors are electrical connectors that use a sleeve of insulating material which tightens when heated. They help create a sealed, more durable connection—important when repairing a harness that’s prone to vibration or moisture exposure.

The hub is the central mounting area for a wheel, and in some designs it also contains or supports sensor components. Here, the host describes a hub-integrated magnet that can crack, leading to sensor failure and a braking-related symptom pattern.

A ceramic magnet is a permanent magnet made from ceramic materials, used in some sensor designs. The host says it’s inside the hub and can crack and fail, which would disrupt the sensor’s signal and cause repeatable symptoms.

The host is describing a braking symptom that’s worst right before the vehicle stops. That timing detail matters because it can point to a specific sensor or wheel/hub-related fault that only shows up under low-speed, near-stop conditions.

The 2004 Volvo S60 is a mid-size sedan where misfire and electrical/ignition issues can show up as both drivability problems and diagnostic trouble codes. In this segment, the host connects the S60’s symptoms (intermittent misfire and multiple warning lights) to ignition components like coils and spark plugs.

“Ball failure” appears to be a mishearing of a warning message related to a specific fault (likely a “coil” or “coil pack”/ignition-related fault) on the Volvo’s instrument cluster. The key point in the segment is that the warning is paired with misfire behavior and ignition-related diagnostic codes.

A misfire is when an engine cylinder fails to ignite its air-fuel mixture at the right time. On modern engines, misfires are detected by the engine computer and often trigger a check engine light, sometimes along with codes that point to specific cylinders.

Spark plugs are the ignition components that create the spark to ignite the fuel-air mixture in each cylinder. If plugs are worn or fouled, they can contribute to misfires, which is why replacing them is a common first step when diagnosing ignition-related codes.

Ignition coils generate the high voltage needed to fire the spark plugs. When coils fail (or break down under heat/moisture), they can cause intermittent misfires and trigger cylinder-specific diagnostic codes.

An ignition circuit code indicates a fault in the wiring/control path that powers or communicates with the ignition coils. When a misfire is present alongside an ignition-circuit code, it often points to a failing coil or a problem in that coil’s electrical connection.

Coil boots are the rubber/insulating covers on ignition coils that help keep high voltage contained and prevent moisture or electrical leakage. When boots crack or degrade, the spark energy can arc to ground, producing intermittent misfires.

“Arc to ground” describes high-voltage electricity jumping through the air to a grounded metal surface instead of traveling through the intended spark path. This electrical leakage can cause misfires that don’t always show up consistently, especially when conditions change (heat, moisture, sitting).

A “tune up” is a maintenance/repair approach aimed at restoring proper ignition and combustion behavior, often involving replacing spark plugs and ignition coils. In this context, the host suggests it because the car has high mileage and recurring misfire-related symptoms.

Bulb wattage is how much electrical power the bulb consumes. Using the wrong wattage can make the lamp draw too much or too little current, which can trigger the car’s lighting warnings.

A lamp-out warning is the dashboard alert that the vehicle detects a non-functioning exterior light. Many cars use current/voltage sensing to notice when a bulb is missing or incorrect, so the warning can appear even if the bulb is physically installed but wrong.

Advance Auto Parts is a retail parts chain where you can look up the correct bulb number for your vehicle. The host’s point is that the counter staff can cross-reference the bulb type so you don’t buy the wrong one.

Dielectric grease is a non-conductive protective compound applied to electrical connectors and bulb sockets. It helps keep moisture out and reduces corrosion, improving contact reliability for lights that live in wet or salty environments.

3157 is a specific bulb type/number that corresponds to a particular electrical and physical bulb specification. The key point here is that a different bulb number (like 3057) may fit but not match the car’s expected wattage/behavior, triggering lamp warnings.

3057 is another specific bulb type/number with its own electrical specification. Even if it’s the “right size” and physically fits, using 3057 where 3157 is required can cause the vehicle’s lamp-out detection to think the light is faulty.

The monitoring system is the vehicle’s built-in electronics that watch the status of exterior lights. It’s described as “sensitive,” meaning it may flag a fault if the bulb’s electrical characteristics don’t match what the car expects.

On many cars, the dashboard warning for a bulb uses electrical sensing. If the bulb has the wrong wattage (or is failing), the circuit resistance changes, and the car’s electronics interpret that as “out.” That’s why the dash can show a tail-light-out warning even when the light is still working.

The speaker is troubleshooting a 1999 Ford Mustang with a 3.8L V6. They’re focused on an idle-only knocking noise and discuss a likely cause in the flywheel/flex-plate area rather than internal engine damage. That’s a common diagnostic path when the noise is tied to engine speed at idle.

A flywheel is the heavy rotating component that connects the engine to the transmission. If a flywheel fastener loosens or a bolt comes loose, it can create a knocking sound—especially at idle—because the part can intermittently contact something nearby. The episode’s logic is that a missing/loose fastener could be the source of the noise.

The bell housing is the transmission housing area that sits between the engine and the transmission. It encloses the clutch/flywheel or torque-converter/flex-plate components and provides the space where loose bolts can fall and get lodged. The speaker describes bolts coming loose and then getting trapped in this area, causing a “tuk-tuk” knocking.

A torque converter bolt secures the torque converter to the flex plate on many automatic transmissions. If one loosens, it can cause intermittent contact and knocking noises that correlate with engine speed. The speaker suggests this as a plausible source because those bolts are part of the same “sandwiched” rotating assembly area.

A flex plate is the thin, engine-mounted plate used on many automatic transmissions instead of a traditional flywheel. It flexes as the torque converter transfers power, which is why the speaker connects it to automatic setups and torque-converter bolts. Loose flex-plate bolts can create idle-only knocking if the plate intermittently contacts something.

The Ford F-150 is a full-size pickup known for strong engine options and heavy-duty use. In this episode, the specific focus is a 2013 Ford F-150, which matters because common oil-leak and timing-cover concerns vary by engine and generation.

A valve cover gasket seals the valve cover to the cylinder head to keep oil from leaking. If the right-side valve cover is leaking, oil can drip onto other engine components and eventually cause secondary problems.

The timing chain cover is the housing at the front of the engine that protects the timing chain area and contains oil in that section. A leak at the front timing chain cover can be messy and may indicate gasket or seal failure that should be addressed before it spreads oil onto other components.

A vacuum pump creates vacuum pressure used by various engine accessories and systems. When oil leaks are described as being “backed by” or near a vacuum pump, it suggests the leak location is close to components that can be affected by oil contamination.

AC hoses are part of the vehicle’s air-conditioning system, carrying refrigerant between components. Oil leaks that seep onto AC hoses can contaminate the system and contribute to failures or reduced performance.

Power steering is the system that uses hydraulic or electric assistance to reduce steering effort. Oil contamination near power steering lines or hoses can contribute to leaks, swelling, or component degradation over time.

Transmission cooler lines are the hoses/pipes that route automatic transmission fluid to a cooler (often in front of the radiator) to keep temperatures under control. If these lines rot, they can leak fluid, which can lead to overheating and transmission damage.

Dorman is an aftermarket parts brand that supplies replacement components for repairs—here, vacuum pump-related parts. The hosts mention they “get them from Dorman all the time,” implying it’s a common, practical sourcing option for this repair.

A valve cover gasket seals the valve cover to the cylinder head to prevent oil leaks. The hosts note that shops may replace the valve cover gasket when the real leak is from the pump underneath, so diagnosis matters.

Timing chains synchronize the crankshaft and camshaft(s) so the engine’s valves open at the correct times. The hosts specifically recommend replacing timing chains and guides on a Ford 13 F 150 (context suggests a Ford F-150) due to known history with chain and guide wear.

Timing chain guides are the plastic/metal rails that position and control the timing chain’s movement. When guides wear, the chain can slack or shift, which can lead to timing errors and accelerated chain wear.

EcoBoost is Ford’s branding for turbocharged gasoline engines designed to improve efficiency while maintaining power. The hosts mention being skeptical when it first launched, and they connect it to long-term ownership (discussing it “in 15 years”).

SEMA is the Specialty Equipment Market Association show, a major annual event where automakers and aftermarket companies debut new products and technologies. The hosts reference it as the first time they saw EcoBoost being introduced.

The Ford F-150 is a widely sold full-size pickup that comes in many configurations, including performance-oriented variants. In the podcast, it’s mentioned in a context involving a Raptor and a vehicle that was being worked on or discussed before the Raptor was “out yet,” suggesting a timeline around a specific build or project. That makes it relevant because F-150s are common platforms for both everyday use and enthusiast modifications.

Fender flares are aftermarket or factory extensions around the wheel openings. They help cover wider tires and protect the body from mud and debris, and they’re common on off-road or race-style trucks.

“Purpose built for towing” means the truck is engineered and packaged for hauling loads—typically with cooling capacity, drivetrain strength, and a transmission/axle setup matched to towing. The hosts argue that exceeding the intended load stresses the drivetrain and reduces longevity.

Gear ratio is the mechanical ratio between gears that determines how the engine and drivetrain multiply torque. For towing, the right gear ratio helps keep engine RPM and load in a range that supports pulling without overheating or excessive stress.

In this context, “AC” means the car’s air-conditioning system. It’s the hardware that cools the cabin and dehumidifies the air using refrigerant and a closed-loop system.

“Air in the system” refers to air entering the air-conditioning refrigerant circuit, which should be sealed. That can reduce cooling performance and contribute to corrosion and component sticking, which can lead to failures.

“Stick and fail” describes how contaminated or corroded AC components can lose smooth movement and proper operation. When parts don’t move freely, the system can stop working or become unreliable.

car-part.com is an online marketplace for used auto parts in North America. It focuses on sourcing parts from independent recyclers, including items like engines, transmissions, doors, seats, and wheels.

In this context, “recycled” means buying parts that have been removed from previously owned vehicles and resold. It’s often cheaper than new parts and can reduce waste by reusing components.

Road Ready Wheels is a wheel brand/seller offering replacement and upgrade wheels. The pitch here emphasizes wheels that fit specific vehicles and can be used as an alternative to expensive dealer replacements.

OEM stands for “original equipment manufacturer.” OEM-looking wheels are designed to match the style and fit of the factory wheels that came on your vehicle.

TPMS sensors are the tire-pressure monitoring sensors that measure tire pressure and trigger warnings if a tire is low. Many vehicles use sensors mounted in the wheel, so swapping wheels often means reusing the existing TPMS sensors and caps.

An agreed value policy is an insurance arrangement where the insurer and policyholder set a specific payout amount in advance for a covered vehicle. That can help avoid disputes over “market value” after a total loss, since the payout is based on the agreed figure.

The Subaru Crosstrek (2018) is a compact crossover that’s commonly used for towing and long-distance driving, which can stress cooling systems. In this segment, the host discusses how adding an oil cooler affected engine oil temperature and transmission temperature while towing a camper.

An oil cooler is an add-on heat exchanger that helps remove heat from engine oil. By lowering oil temperature, it can help the oil maintain proper viscosity and reduce stress during heavy loads like towing.

Mishimoto is an aftermarket brand known for cooling upgrades like oil coolers and radiators. In this segment, the Mishimoto oil cooler is credited with lowering engine oil temperature during towing.

Towing a camper is a heavy-load situation that increases heat generation in both the engine oil and transmission. That’s why temperature monitoring (engine oil temp and CVT temp) is especially relevant during towing.

The Lucid Air is an electric luxury sedan known for its efficiency and advanced thermal management. The podcast mentions a cooling-related issue: at higher speeds, there may not be enough airflow across a cooler, which can affect how well the system stays within temperature limits. That’s a practical topic for EV owners because cooling performance can influence sustained driving and component longevity.

E30 fuel refers to a gasoline blend containing about 30% ethanol (the rest is gasoline). Because ethanol content affects fuel properties like energy content and how the fuel burns, the exact ethanol percentage matters for compatibility with an engine’s fuel system and tune.

The BMW 3 Series is a compact luxury sedan that’s often discussed because of its long-running popularity and the variety of generations and engines. In the podcast, it’s mentioned in connection with an E30 fuel-related topic, and the host notes they don’t have that fuel available locally, so they mixed something else. That suggests the conversation is about how fuel choice affects testing, tuning, or engine behavior on a specific 3 Series-related setup.

The 2022 Chevrolet Silverado with a 6.2L V8 is a common towing truck, and its fuel recommendation (91 octane in this case) is tied to how its engine is calibrated to avoid knock. When you start blending ethanol fuels like E85 to reach E30, you need to consider both octane and the actual ethanol percentage to stay within what the engine can handle.

Octane is a measure of a fuel’s resistance to knocking (premature combustion) in an engine. Higher-octane fuels generally tolerate more aggressive ignition timing or higher compression without knocking, which is why the Silverado’s recommendation (91 octane) matters when blending fuels.

In this context, “alcohol” means ethanol content in a fuel blend. The key point is that E85 isn’t always exactly 85% ethanol, so you can’t reliably calculate an E30 blend by assuming the pump’s ethanol percentage is fixed.

A flex-fuel vehicle is designed to run on fuel blends that can vary in composition, most commonly gasoline mixed with ethanol. The key point is that the engine management system expects different ethanol percentages and adjusts accordingly.

The speaker argues that the ethanol percentage in a station’s tank can change over time, so you can’t reliably “sense” the blend by feel or assumption. They stress that the only way to know the exact mix is to measure or test the fuel.

The speaker describes a separation test using water to distinguish ethanol-containing fuel from gasoline. Ethanol is miscible with water, so adding water can separate components and reveal the blend’s composition indirectly.

E85 refers to a fuel blend that contains up to 85% ethanol mixed with gasoline. Because the ethanol percentage can vary, the actual blend in a tank may not match the label unless it’s measured or tested.

A lead additive (or lead substitute) is used to replace the protective effects that lead once provided in gasoline. In older engines, it helps protect valve seats from wear when running on modern unleaded fuel.

A lead substitute is a modern chemical additive formulated to provide the valve-seat protection that lead used to give in gasoline. The host emphasizes choosing a product labeled for “lead substitute” and mixing it at the correct ratio.

Valve seats are the hardened surfaces in the cylinder head where the engine’s valves seal when closed. Older engines can experience accelerated wear on these surfaces when fuel doesn’t provide adequate lubrication/protection, which is why lead substitutes are recommended in some cases.

ZDDP (often written as ZDDP) is an anti-wear additive package used in engine oil to protect metal surfaces under high load, especially in flat-tappet cam and lifter setups. The host recommends adding a ZDDP additive for this Corvair because the valvetrain needs extra protection.

A zinc substitute additive refers to products that supply zinc-based anti-wear chemistry similar to what ZDDP provides. In practice, it’s used to increase the oil’s anti-wear protection for older engines that may not be adequately protected by modern low-phosphorus oils.

A “metal conditioner” is an oil additive product intended to improve how engine metal surfaces behave under load. In this context, it’s described as protecting high-pressure areas and helping reduce wear on components like the camshaft and bearings.

The camshaft is the engine component that controls valve timing by opening and closing the engine’s valves. When the host mentions protecting the camshaft, they’re referring to reducing wear on the cam lobes and related contact surfaces.

Bearings are precision components that allow rotating parts to move with low friction. In an engine, bearings rely heavily on oil lubrication; the segment frames additives as helping protect bearings from wear in high-pressure conditions.

The Chevrolet Corvair is a classic American compact that’s especially known for its rear-mounted, air-cooled flat-six engine layout. A 1965 Corvair is part of the second-generation run and is a popular enthusiast collectible today, often discussed for its unusual engineering compared with most front-engine cars of the era.

“Spider” is a common nickname for certain open-top convertibles, usually implying a sporty, roadster-like character. It’s not a single technical system—more a styling/marketing label for a convertible body style.

The Ford Escape is a compact SUV, and this one is a 2019 model with a 2.5-liter engine. The “non-eco boost” wording suggests it’s not the turbocharged EcoBoost variant, which matters because different engines have different common failure points and diagnostic paths.

Intermittent stalling—where a car “randomly wants to die”—is often harder to diagnose than a constant problem because the failure may not reproduce during testing. Shops typically need to capture data (fault codes, freeze-frame info) or observe the car under the same conditions when it stalls.

“Idle in park” means the engine is running while the transmission is in Park (not moving). If the car stalls from idle in Park, it points toward issues like fuel delivery, ignition/sensors, or electrical power supply—rather than a problem that only happens under load.

An alternator is the engine-driven generator that powers the car’s electrical system and recharges the battery while you drive. If the alternator is weak or failing, the car can start poorly, stall, or die—especially after driving for a short distance—because the battery isn’t being properly replenished.

A battery cable is the heavy electrical lead that carries power between the battery and the vehicle’s electrical system. If the cable connection at the stud isn’t tight or is corroded/contaminated, the car can intermittently lose power, die, and then restart after conditions change.

Corrosion is the buildup of oxidized/chemically degraded material on metal contacts. Here, corrosion (plus grease/oil/dirt) can prevent a reliable electrical connection, leading to intermittent starting issues.

“Stable” here refers to a specific fuel-stabilizer/additive brand the hosts are discussing for preventing fuel-tank rust. They mention it has a product called “vapor action” that’s intended to protect the tank even when fuel level is low.

“Vapor action” is the name of a fuel-tank additive product that works via the fuel’s vapor space. The idea is that when the tank is low (down to about a quarter or even an eighth), the additive helps the fumes contact the tank walls to slow rusting.

The Ford Model T is an early classic car with a very simple, older-style fuel system, which is why rust inside the tank can be a recurring issue. The host mentions using the additive in a Model T to address prior rusting problems.

Rust prevention here is about controlling moisture at the car’s underside. Even if the air is humid, the biggest driver is often water vapor and condensation coming up from concrete or dirt and contacting metal surfaces.

A vapor barrier is a sheet of material (often plastic) placed between the ground and the vehicle to block water vapor from rising through concrete or soil. It helps reduce rust by keeping moisture from reaching the underside of the car.

The Subaru Outback is a long-running crossover/wagon built around Subaru’s all-weather, all-wheel-drive reputation. In this segment, the key issue is fuel compatibility on a 2017 Subaru Outback—specifically whether it can run on higher-ethanol blends like E15 or E10.

“87” refers to gasoline octane rating (87 octane), which is the fuel’s resistance to knocking. The segment ties octane and ethanol blends together by discussing how the car has been running 87 and whether switching to E15/E10 is acceptable.

E15 is gasoline blended with 15% ethanol. Ethanol content affects how the fuel burns and can change fuel economy and compatibility, so the question here is whether a 2017 Subaru Outback is approved to use E15.

Fuel compatibility is whether a vehicle’s engine management and fuel system are designed to handle a specific gasoline formulation (like ethanol percentage). In this segment, the hosts focus on whether a 2017 Subaru Outback can safely run E15/E10 based on its age and testing history.

E10 is gasoline blended with 10% ethanol, which is widely used and commonly supported by modern vehicles. The hosts are saying E10 (and E15) should be fine for this 2017 Subaru Outback, assuming it’s within the manufacturer’s fuel-spec approval.

The Mercedes-Benz E350 is part of the E-Class lineup, and in 2013 it’s typically a V6-powered luxury sedan used as a comfortable daily or “summer car.” In this segment, the key issue is ignition-related misfires that show up as diagnostic trouble codes after the car was serviced.

The BMW 1 Series is a compact luxury car, and the podcast references the E87 generation specifically. It’s brought up because someone had a car for a prom and later “hasn’t had anything but issues,” implying ongoing problems after the vehicle was obtained or modified. That makes it a useful topic for listeners because it highlights how certain used BMW 1 Series examples can be trouble-prone depending on condition and maintenance history.

Fuel trims are the engine computer’s short-term and long-term adjustments to how much fuel it injects. They’re used to correct for differences in fuel quality, air leaks, sensor readings, and—relevant here—switching between fuels like E85 and 91 octane. If the trims can’t correct enough, you can get drivability issues and misfires.

“Running rich” means the engine is getting too much fuel compared to the amount of air (a fuel-to-air ratio that’s richer than ideal). With E85’s higher alcohol content, the car should compensate by injecting more fuel—but if adaptation doesn’t happen correctly, the mixture can end up too rich. A rich mixture can affect power, fuel economy, and can trigger emissions-related codes.

The fuel-to-air ratio is the balance between how much fuel the engine injects and how much air enters the cylinders. Combustion depends on this ratio, and different fuels require different amounts to burn efficiently. Ethanol blends like E85 typically require more fuel for the same amount of air to maintain the correct ratio.

“Running rich” means the engine is getting more fuel than the ideal air-fuel mixture for efficient combustion. That can improve drivability in some situations, but it usually hurts fuel economy and can increase emissions.

A “rich” mixture burns fuel inefficiently, so the engine uses more gasoline than necessary. That’s why the speaker links rich operation to poor fuel economy.

“Relearn” refers to the engine computer updating its adaptive fuel/air control settings after a change (like fuel type or sensor behavior). Many modern cars use learning to maintain the correct mixture and emissions performance over time.

“Reprogramming” means updating the vehicle’s engine control software (ECU/PCM calibration) so it can properly manage fuel and drivability for the intended fuel type. This is often needed when the car’s calibration doesn’t match what’s in the tank or when switching fuel strategies.

“91 premium” refers to gasoline with an octane rating of 91. Higher-octane fuel resists knock better, and some engines are calibrated to run best (or only) on premium for safe combustion under load.