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 ...

Spark plugs may be small, but they have a huge impact on your car’s performance, fuel economy, and reliability. Choosing the right type, using the correct tools, and following proper replacement steps ...

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 ...

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 ...

Your engine’s spark plugs are one of its smallest and most important, parts. We look at some of the best. The engine in your car, truck, or crossover operates on the simple principle of capturing the ...

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 ...