Learn how to easily test a spark plug to rule it out as the cause of your engine problem. A simple and highly effective method(when done properly) that I've always used to confirm if a spark plug is/is not the cause of engine starting and/or performance problems. Why run to the store and buy a new spark plug as a gamble, which may not be inexpensive, when you can verify if the plug is the problem using your digital multimeter. Save time and money! No method is 100%, but this method has been proven to work the great majority of the time.

I decided to upload this video when I discovered that not too many people knew about this simple, effective spark plug test.

**RULE OUT SPARK PLUG WIRES with my other video:

   • How To Test Spark Plug Wires  

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