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Home > Performance Guide > Tip of the Week > Tip 4: Spark Plugs > Diagnosing Spark Plug Health
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Diagnosing Spark Plug Health



Check your spark plugs periodicially to see how they are doing. Here are some symptoms you may see.



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Happy Spark Plug
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Fouled Spark Plug - click to enlarge
Happy Spark Plug
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Fouled Spark Plug
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Melted Spark Plug
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Spark Plug Overheating
Melted Spark Plug
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Spark Plug Overheating
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Broken Spark Plug
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Leaded Gasoline and Spark Plugs
Broken Spark Plug
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Leaded Gasoline and Spark Plugs
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Normal Worn-Out Plug
Normal Worn-Out Plug
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