In racing, spark plugs are practically a disposable commodity. Use them for a while and throw them away. If the engine starts acting funny, replace the plugs just in case. It's cheap insurance and ...

Worn spark plugs can really hurt performance and fuel economy. Here's how to tell if it's time to replace them to keep your ...

Perhaps my google-fu is weak today. I have an '88 Honda Accord, and I'm trying to change the spark plugs. I've done several searches but I just can't seem to find any reference as to what to gap my ...

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 ...

The ignition is easily the most misunderstood system in any car. Most enthusiasts treat ignitions like some sort of weird, black magic/voodoo curse best left alone until it fails. Either that or they ...

You might not think about spark plug heat ratings often, so here's a rundown on what that means and how it affects your ...

You've got an intake, an exhaust, and a programmer but are still hungry for more bolt-on performance. Most people turn attention to the ignition next. To get more ...