Attach the spark plug to a spark plug tester, then connect the tester to the ignition wire. Start the engine and observe the ...

Though small, spark plugs play an important role in getting your vehicle started and keeping it running—so when they’re past their prime, you’re going to want to replace them.

Use a spark tester to check the ignition coil. Plug the tester into the coil. Attach the ground wire. Plug in the coil connector. Adjust the spark gap to the correct measurement. Start the engine.

Pull your spark plug wire, thread the compression tester's fitting into your spark plug hole, and turn your engine over with the key. Unplugging your fuel pump relay and ignition coil is good ...

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 tech article on testing and reading your spark plugs. Find all the details inside Circle Track Magazine.

This video explains the different types of spark plugs,copper, platinum, double platinum, iridium, and even newer advanced designs,and helps you understand which is best for your vehicle.

Fitting a gasoline-powered car engine with laser spark plugs sounds like sci-fi, but it may stave off the electric revolution a little while longer.