Spark plug testers will only help you figure out issues related to spark plugs. Does that make them useless, or is there a ...

It's springtime! Time to start working on your project car, learn a new wrenching skill, discover what everything is under the hood (and how it works), or just spruce up your daily driver. All month, ...

When building a custom engine combination, it becomes a challenge to choose the right spark plugs, since there are often no factory reference points from which to start. And this is much more than ...

A gas engine needs fuel, air, and spark to get its internals chugging along. Take any of these out of the equation and the engine will have a fit. While the automotive industry shifts toward fully ...

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 ...

Yes, they're small, and they all practically look just alike, and even in the best of circumstances you're throwing them away and replacing them every few races, but spending a little time to make ...

Spark plugs play a key role in igniting the air-fuel mixture that enables the engine to transition from cranking to running on its own. Considering the relatively lengthy service life of these small ...

We may receive a commission on purchases made from links. An indispensable part of the gasoline combustion process is spark ignition (provided by spark plugs), which sets off the fuel and air mixture ...