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Other Systems

Learn about the various electrical and other systems that lurk under your hood, including cooling systems, ignitions, wires, fuses and connectors.

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How does a positive crankcase ventilation (PCV) system work?

Just seeing the phrase "positive crankcase ventilation" probably makes your head hurt, because it sounds, well, complicated. But it really isn't all that complex.


Do you need a secondary air injection system?

Your car's engine always leaves behind some portion of unburned fuel. Good thing the secondary air injection system is there to help clean up the leftovers. But is it really necessary? See more »

Do HHO systems actually work?

Ever since inventors have tried to get cars moving, they've tinkered with the possibility of alternative fuel systems. What does an HHO system have to do with water, and does it actually work? See more »

How Automotive Exhaust Systems Work

Whether it makes your car sound like a swarm of angry bees or the deep rumble of an earthquake, your car's exhaust system is doing its job every time you turn the key. See more »

How Automotive Air Conditioning Works

If you're buying a new car, you know air conditioning is almost certainly a standard feature. But it wasn't long ago when AC was an expensive option. Find out how this now nearly universal feature works. See more »

How Evaporative Emission Control Systems Work

As if the price of gasoline isn't bad enough: Did you know that the fuel in your car's gas tank is slowly evaporating away? Even when parked? See more »

Can a car seat recognize its owner's rear end?

Researchers in Japan have developed a new method of auto theft deterrent that verifies the driver's identity. Are you comfortable with your car seat knowing this much about you? See more »

How will the car of the future use biometrics?

We can already use biological markers to identify people, but within the next decade, similar technology is coming to our cars, too. Will this be yet another distraction for drivers? See more »

Distributor caps and rotors help transfer the spark from the coil to the cylinder. Learn how distributor caps and rotors function in ignition systems in this article. See more »

Ignition coils are responsible for passing electricity on to your spark plugs. Learn about the symptoms of ignition coil failure in this article. See more »

The radiator of your car is composed of tubes that carry the coolant fluid, a protective cap that’s actually a pressure valve, and a tank on each side to catch the coolant overflow. Learn more about how a radiator cap works from this article. See more »