Spark plug testers aren't entirely necessary, but they can provide convenience when you're specifically trying to figure out ...

This spark plug tester features an innovative dual-socket design, allowing you to test two spark plugs simultaneously. By taking this approach, you can effectively compare the spark intensity of two ...

Simply put, getting the maximum power from any race engine is a function of the temperature, pressure and timing of combustion gases in the cylinder. Since it would be expensive and impractical for ...

All spark plugs may look the same to the untrained eye. Unfortunately, nothing could be further from the truth. For starters, spark plugs come in many types that are mainly differentiated by the ...

We may receive a commission on purchases made from links. When it comes to engine care 101, a spark plug replacement — also referred to as a tune-up — is an essential task. Spark plugs, as the name ...

Spark plugs are an integral part of your engine, but they need to be replaced every so often. We'll tell you how to find out ...

For hot rodders, spark plugs are often nothing more than inspection tools that reveal whether an engine is running too rich, too lean, or just right. Street guys look for a nice tannish-brown tint on ...

Spark plugs can get wet for any number of reasons -- they can be covered in fuel, water or oil -- but if that's the case, ...