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6.0 running bad-good bad- no codes or smk
my 2003 6.0 is running terrible.
there are no codes and no smoke.
it sometimes runs great, then all of sudden, it just sounds like it is running on a couple of cyl. it will rev up but slowly and as if it is starved for fuel/air?
then it will go back to normal and all will be fine until it does it again. can last 5 minutes or 10minutes. at any speed.
anyone have any ideas before i start replacing parts?