Thread: 15,000 miles and spark plug carbon closed gap??!!
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Old Jul 21, 2011 | 10:38 AM
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FP
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Joined: Aug 2006
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From: Crystal Lake, IL
Default Re: 15,000 miles and spark plug carbon closed gap??!!
Many things can cause this, but bad gas will definitely do this. Make sure you use quality premium gas.
 
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