Editing Reading spark plugs (section)
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==Overview== The spark plug is a window into the combustion chamber. To a well trained eye, the plug can tell a volume of information about the engine's condition, air/fuel mixture, timing, fuel distribution through the intake tract, and more. No single article will be able to bring someone from a beginner to a pro at anything, and reading plugs is no exception. But the basics can be conveyed well enough to get a leg up on how to read a plug beyond the common practice of looking at a plug with thousands of miles, as well as recent stop and go driving on it, to tell what is going on inside the engine. While that can give a general idea of conditions on a very broad scale, there are more precise ways of reading a plug. The following article draws heavily on an article written by Brian Odom. It's as complete, if not more, so than most articles on the subject as well as including photographs to supplement the text. [[File:FLASHLIT.jpg|right]]
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