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Plug Problems....


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Wow has it been a long time since I have been around here! Anyway...2002 2500HD stock 8.1L. I seem to be fouling up the spark plug in cylinder #4, so much so that I throw a code. Replace it, it's good for another 10K miles. When I was replacing it today I noticed what looks like a crack in the exhaust manifold right above the tube leading out of the cylinder. Think that could be related? I have about 175K miles on it, mostly highway and country roads. Engine runs fine aside from this one problem. Thoughts? Comments? All would be appreciated.

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