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Old 09-29-2020, 08:47 AM   #13
Bob Bidonde
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Join Date: May 2010
Location: Long Island, NY
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Default Re: Mystery missfire .

My thought is that the problem is heat sensitive. For example, a thin valve head / recessed valve will warp and leak when hot, but it will pass a compression check at ambient temperature. I wish you the best of luck finding the issue.
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