How to Read Spark Plugs

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Information that can be gathered from spark plugs. Learn how to read a spark plug in this free online instructional video.

Part of the Video Series: Changing Spark Plugs
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Video Transcript

In this video clip I will show you how to tell if your spark plug is good or bad. What I would like to do at this point is log on to and what I will search for is spark plug diagnosis. And what this will do is it will bring up a number of resources that will help me figure out what might be wrong with my spark plug. So I am going to click on the first one and the website that comes up gives us a picture of what your spark plug might look like. It talks about its appearance and it also gives us some possible causes and resolutions for figuring out how we might fix our spark plug problem.


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