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Laneco
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Join Date: Jan 2005
Location: Usa
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Actually he has 20K on the rebuild and an unknown # of miles on the rest of the truck likely including the cats. But as the problem seems to indicate a single cylinder, then the cats are not a likely issue as that would impact the entire bank (or the entire engine if single cat).

I'm not a mechanic, nor did I sleep in a motel 6 last night. But I do seem to recall these engines would occasionally develop cracks in the cylinder heads. That could manifest as a miss that is not related to fuel or ignition issues. Really need to do a good compression/leakdown on this one.

angela
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Old 12-26-2017, 08:00 AM
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