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Spark plugs: 7 tan, 1 black Spark plugs: 7 tan, 1 black
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Old 07-11-2007, 08:07 PM
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Default Spark plugs: 7 tan, 1 black
My Cobra has 2500 miles, so I decided to change the plugs. It has a 427 Genesis sideoiler, Holley 850 CFM carb. Runs great - no complaints. Seven of the plugs had a nice dark tan color. No significant carbon or oil. But one was black and grimmy. The car uses about a quart of oil in 300 miles. No oil leaks whatsoever (hard to believe!). Any ideas why? Should I be concerned about that one nasty looking plug?

Chuck
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