Hi y’all. Looking for a little help here with this one. Trying to help the boss man out with the company truck. This thing has multiple misfire codes and the shop they took it to replaced and programmed the PCM, all the coils, all the wires, and all the plugs and it’s still acting the fool. I’ve read about broken valve springs, clogged cats or low fuel pressure throwing the same codes and didn’t know if anyone here has had any similar experiences with these 6.2 gassers. Thanks for the help. Jason
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Need to take the valve covers off to investigate.
Were the misfires only on one cylinder?Last edited by Katsaregood; 06-19-2021, 07:05 PM. -
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If it isn’t broken valve springs then it might be bent valves caused by timing chain tensioner not doing its job. Check the engine oil for metal particles. It has two timing chains and two tensioners, one for each bank.Comment
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^^^ thank youComment
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First time I’ve seen your screen name !
Very good choice Sir.Comment
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My money on timing chains and cam phasers if that engine is built that way. Does it ever rattle on cold start?Comment
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