Spark plugs sit at the center of every gasoline engine’s heartbeat, turning fuel and air into the controlled explosions that move your car. When they work properly, you feel smooth power, quick starts ...

Checking, replacing and maintaining your spark plugs is actually one of the easier and most affordable car-maintenance jobs you can do in the comfort of your own driveway — that is, if you don’t screw ...

See how to replace your spark plugs here. If your spark plugs are worn out, new ones can dramatically improve your performance. Doing it yourself is easier than you think. Make sure the prop rod is ...

You're hunched over the engine with your wrist painfully contorted, wishing you were Mr. Fantastic. You've finally removed broken spark plug number four and then the intrusive thought hits. "Should I ...