How to Use a Spark Plug Tester
A spark plug tester is a device used to test the spark plugs in an internal combustion engine. It is a simple and inexpensive tool that can help you quickly and easily diagnose ignition problems. Spark plug testers come in a variety of shapes and sizes, but they all work on the same basic principle. By connecting the spark plug tester to the spark plug wire, you can create a spark that will jump across the gap between the spark plug electrodes. If the spark is strong and blue, it means that the spark plug is working properly. If the spark is weak or orange, it means that the spark plug is not working properly and should be replaced.