Car Exhaust and Emissions
This section can help you keep your exhaust system working properly. Learn how mufflers, catalytic converters and oxygen sensors work.
10 Popular Car Modifications
How to Set up Car Speakers
10 Car Accessories That Could Be Dangerous
Modern Cars Are Kind of Boring. Why Is That?
Can car companies let known defects go without a recall?
Do car interiors turn toxic in the summer?
Making a Car Last for 300,000 Miles Is Totally Possible — Here's How
Are cars designed to fail at a certain point?
Will it hurt to spray electrical contact cleaner in an ignition?
What's the Fastest Car in the World?
Is Your Junk in the Trunk or the 'Frunk'?
You Can't Take Your Fancy Self-Driving Car Out of the City, Yet
The Long Strange History of License Plates in the U.S.
Do red cars get pulled over more often for speeding?
Do red cars cost more to insure?
How Do I Get Rid of a Dead Animal Smell in My Car?
5 Signs Your Engine Is Losing Power
How Gas Compression-ignition Engines Work
Did cars ever have external combustion engines?
How does engine placement affect handling?
10 Cold-weather Motorcycle Accessories
Is all motorcycle apparel made of leather?
What motorcycle accessories will help me stay cool?
How Laser-powered Headlights Work
How Air-Conditioned Seats Work
5 Useful Voice-activated Commands for Your Car
How to Avoid a 'Hurricane Car'
6 Automotive Parts You Can Easily Recycle
Get Money For Your Old Car Batteries
How Does Vertical Acceleration Work?
How Car Suspensions Work
How Car Steering Works
Why the Stick Shift Is Going Extinct
Gas-powered vs. Electric Cars: Which Is Faster?
Are manual transmissions really faster than automatics?
How to Replace Your Car's Serpentine Belt
The Dirty Truth About How Often You Need Your Oil Changed
Is Your Car Road-trip Ready?
Why Do Tires Blow Out More in Summer?
Winter Tires Really Do Make a Difference in the White Stuff
Why Carmakers Are Ditching the Spare Tire
What Is an Ignition Coil?
Can your car tell you when the light's about to change?
How the Open Automotive Alliance Works
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Have the right Volkswagen execs paid for lying to the public about their car's environmental standards and emissions?
By Diana Brown
Whether diesel- or gasoline-powered cars spit out more toxins depends on the pollutant measured, a new study says.
In a truck pull competition, excessive clouds of diesel smoke are a byproduct of the truck's functionality. But coal rollers have taken this idea from the county fair to the public roads -- all in the name of making people angry.
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You see it every time smoke billows from your car's exhaust pipe. There's no denying that vehicles are major contributors to air pollution. But how much are they responsible for?
Here are seven easy ways to reduce your emissions without affecting the quality of your daily commute. Learn more about the top 7 ways to reduce your driving emissions without reducing quality of life.
To reduce your cars emissions, you can help its catalytic converter work more efficiently by preheating it, or you can inject a urea solution into your exhaust pipe. Learn what you can do to reduce your car's emissions in this article.
It seems like a logical answer to the climate crisis: capture the carbon dioxide that our cars emit. Is it that simple? And what do sand and silica have to do with it?
By Josh Clark
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I have a dirt bike and the exhaust pipe has this big bulge in it near the engine. What is the bulge for?
Every car out there has a muffler -- it performs the crucial job of turning thousands of explosions per minute into a quiet purr. Mufflers use some cool technology to dim the roar of an engine. Learn the principles that make it work.
By Karim Nice
A catalytic converter is one of the most important parts of a car's emissions control system. It treats the exhaust before it leaves the car and removes a lot of the pollution. Learn how they work.
By Karim Nice & Charles W. Bryant
Exhaust emissions test check for the absence of a catalytic converter or a malfunctioning one during an emissions inspection. Read on to learn how you can find out if your catalytic converter has failed.
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An oxygen sensor in a car is a very important part of making your engine run smoothly. Learn what it does and what can happen if your oxygen sensor fails.
If you have a vehicle that needs to be tested for emissions, you might want to check on the condition of your catalytic converter. So what is it and what does it do?