Exhaust And Emissions

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What's Causing That Smell in My Car?

What's Causing That Smell in My Car?

By Rick Popely on August 17, 2016

CARS.COM — If your vehicle is giving off an unusual or sickening odor instead of that new-car smell, follow your nose and find the source of the aroma. Bad smells can lead to expensive rep... Read More
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Why Is My Muffler Rattling?

Why Is My Muffler Rattling?

By Rick Popely on May 31, 2016

A loose bracket, rubber hanger or connector, or one that is badly corroded, can allow a muffler to rattle when you accelerate or drive on bumpy roads, or even when the car is stationary and idli... Read More
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When Should You Replace the PCV Valve?

When Should You Replace the PCV Valve?

By Rick Popely on January 24, 2016

The positive crankcase ventilation system was one of the earliest emission-control devices. It draws leftover combustion gases from the crankcase (the oil pan and bottom of the engine) and route... Read More
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What Are Common Catalytic Converter Problems?

What Are Common Catalytic Converter Problems?

By Rick Popely on January 24, 2016

Catalytic converters are located in the exhaust system, between the engine and the muffler, and are one of the last lines of defense against air pollution from vehicles. They use ceramic-coded b... Read More
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What's Included in a Tuneup?

What's Included in a Tuneup?

By Rick Popely on January 24, 2016

Actually, there is no such thing as a tuneup in the traditional sense of replacing parts to bring the ignition and fuel systems up to specs for maximum performance and efficiency, and there hasn... Read More
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How to Tell If a Car Has an Exhaust Leak

How to Tell If a Car Has an Exhaust Leak

By Rick Popely on January 24, 2016

CARS.COM — Your ears and nose can alert you to some exhaust leaks, but they may not be able to detect all leaks, including ones that could allow carbon monoxide inside your vehicle, which ... Read More
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What Are Common Exhaust System Problems?

What Are Common Exhaust System Problems?

By Rick Popely on January 24, 2016

By Rick Popely, Cars.com Rust is the No. 1 enemy of exhaust systems, but it is by no means the only one. For example, bottoming out over bumps can cause physical damage to car parts; mufflers ... Read More
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When Should the Oxygen Sensor Be Replaced?

When Should the Oxygen Sensor Be Replaced?

By Rick Popely on January 24, 2016

By Rick Popely, Cars.com Oxygen sensors are not among the maintenance items that need to be replaced regularly, such as oil and air filters, so they typically are replaced only when they fail.... Read More