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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,692
Too cold a plug. Add to that maybe a little oil getting past the valve guides and some blowby on the rings.

I'd go to a 4 heat range plug and check it again. A leakdown test might help pinpoint if there are other problems.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 06-21-2007, 05:38 AM
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