How to Read Spark Plugs

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Spark Plug Reading​


Get help learning if your car is running too rich, too lean, too cold or too hot.

There is a great website with a load of pictures for each event located here:

There's a link on the page to additional 30 images of plug conditions.
Spark Plugs

While this is a motorcycle site, spark plugs react the same ways in cars.
 
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