Spark plugs are critical components of any gasoline engine, but since they ignite the compressed mixture of fuel and oxygen millions of times during their lifespan, they eventually cease to fire and ...

Engine behavior changes as spark plugs wear, with symptoms like misfires and rough idling. But what causes them to wear down ...

An internal combustion engine needs three things to get going: Air, fuel, and spark. The throttle body and intake plenum feed air, while injectors spray the right fuel mix into the combustion chamber.

Spark plugs play a key role in keeping your engine running, since it's that little jolt of electricity that ignites the fuel/air mixture in a motor's cylinders. And that little spark has to be ...

Spark plugs are one of those maintenance items that, along with things like brake fluid and thermostats, are easily overlooked but extremely important to your car's safety, longevity, and performance.