If you consider your spark plugs little more than disposable engine parts to be replaced for every event or two, you're missing out on a valuable engine-tuning tool. Not only can the correct plug ...

Something about engine spark plugs that rarely seems to get mentioned is indexing. What is it, actually? Should you index the spark plugs on your engine?

Replacing your spark plugs is important and usually a fairly simple process, but if they seize in the cylinder heads it's an ...

Read a good spark plug lately? We hope so, for your engine's sake. But spark plug reading—the traditional way to check your fuel mixture and monitor other vital conditions in the combustion chamber ...

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 plug fouling can be caused by dirty injectors or overly-rich fuel/air mixtures. Keeping up with maintenance and ...

Any certified gearhead knows that diesel engines do not use spark plugs. But why not? If power in an engine is created by combustion or explosion of flammable liquids, won't a spark plug in a diesel ...