Why test a spark plug? When your “check engine” light comes on —or you’re experiencing some other not-immediately-identifiable issue with your engine—there could be a variety of things ...

In this video, I show you how to test spark plugs and coils on any car, even if the spark plugs are recessed or hard to reach. Whether you're troubleshooting engine misfires, poor performance, or ...

The guys at Muscle Car Review show you how to check engine compression with the latest tools. Check it out only at hotrod.com or the October 2011 issue of Muscle Car Review Magazine.

When your check engine light comes on, it is a warning that something is wrong with your vehicle. Here are five of the most likely causes to check for.

We walk you through a compression test, a great way to determine the condition of your valves and piston rings.

Your car's check engine light is a car's way of telling you something is wrong, so it should never be ignored.