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Old 08-11-2005 | 03:57 PM
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davewallace
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Default RE: What's wrong here?


ORIGINAL: Crash90

My biggest concern was that while one plug was light tan, the other was black and oily. If that is the case again then it would almost have to be a problem with either the ignition or an air leak no? I mean, other than that what would cause 1 cylinder to run richer/leaner than the other??
Hi,
The answer to your question is unequal back pressure.

Dave