Check, replace and maintain the spark plugs in your car or motorcycle with this easy guide.

To test the operation of both the ignition coil and the spark plug, connect the tester between the spark plug boot and the spark plug. Then start the engine and watch the tester window.

You can use a multimeter to test the resistance to be sure. Q: How Can You Tell if a Spark Plug Is Firing? A: The grounding test is performed to determine if a plug is firing.

A. No, the spark plug and ignition coil are two separate parts. The ignition coil feeds the spark plug high voltage. Q. Yeah, But How Much Does It Cost To Replace an Ignition Coil?

Car Care: Take cars that misfire to a repair shop, where their spark plugs and ignition boots should be checked.

In this vintage Corvette tech guide we explain ignition coil troubleshooting with C1, C2, and early C3 Chevrolet Corvettes using simple tools at home - Corvette Fever Magazine ...