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Old 07-24-2010, 02:30 PM
Argess Argess is offline
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Last time I had a plug like that, the timing was way too far advanced and I was getting detonation.

On the other hand, it could be very, very lean.

From what I understand, a water leak into the combustion chamber can also do that, but I think too far advanced timing is the most likely cause.
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