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Discussion Starter #1
I ran into something pulling the headers off my truck tonight I had never seen. The bottom of the back 2 exhaust ports on the rear of each head had some smudgey, somewhat sticky dark grey residue on them. The front exhaust ports did not. I was wondering if maybe it was unbearned gas as I had had some trouble with a screwy fuel pressure regulator. Any ideas what might be the problem?
 
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