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Old 01-20-2018, 07:34 PM   #2
izzy_Britton
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Join Date: Apr 2013
Location: Nor-Cal
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Re: 2003 2500hd 6.0 odd vacuum leak issue

I am by no means an expert. I am just thinking out loud and guessing right along with you.


NO CODES?


it kinda sounds like you might have a a coil pack wire harness short somewhere? with both sides of the engine having misfires it doesn't sound like the coils them selves are having issues or that only a single side coil harness is having issues. can you disconnect the coil pack harness mail connector and clean the connectors with some circuit board cleaner and plug it all back in to see if that helps?

another thought sounds like maybe the injectors got some gunk in them and is clogging or partially clogging the injectors?
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