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Message: <blockquote data-quote="TTSaleen" data-source="post: 1508576" data-attributes="member: 16025">Your plugs are really rich.Have you had it dyno tuned and if so, what was the air/fuel ratio not only during the pull (wide open throttle) but at driveability/cruising?   To me it appears to be on the rich side of things which causes the plugs to look like that.  This can attribute to a strong odor of fuel from the exhaust and poor gas mileage in addition to a bucking at low rpms (due to unburnt fuel).What is the fuel pressure?  How does it run otherwise?It may simply need the tune adjusted to be slightly leaner for the driveability.  Ryan</blockquote>