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 ...

A compression test is to determine how much pressure the engine makes, and a leakdown test measures its ability to hold pressure.

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.

In this video, I’ll show you exactly how to test your BMW spark plugs, ignition coils, and coil wiring without needing a multimeter—just using the kit provided. Whether it’s a misfire, bad ...