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Old 08-26-2010, 01:31 AM   #9 (permalink)
clarkperez2334
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I think this is an oil fouled condition of the spark plug commonly caused by cylinder walls that are faultily worn. Oil may be pulled into the chamber because of intense clearance in the valve stem guide. When the PCV valve is plugged or is not working this could result to a buildup of crankcase pressure. This condition can force oil vapors and oil past the rings and valve guides into the combustion chamber.

This condition of a spark plug shorted by excessive oil entering the combustion chamber is commonly known as Oil Fouled.
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