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knocking after tune

1856 Views 47 Replies 14 Participants Last post by  Grabber523
has anyone encountered this problem? after i installed my kb tune i needed to change back to stock, and after reinstalling the kb tune back in i have a severe misfire / knock. after this i sent the sct back to kenne bell, they said everything was fine with the tune and even sent me a new sct. the car still sounds like a jackhammer but will not display a code. any ideas?
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no, i just installed the stock tune and left the blower on just to see if it would idle regular which it did not. i also tried the reset the ecm thing with no luck. the problem must be with the ecm or the x cal.
How long did you run it this way?
Glad you got it taken care of man, did you add some cams while you were there?
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