Scan showed misfire on 6 and 8. Swapped 2 and 4 to those spots , still misfiring 6 and 8. Changed ficm and injector harness and still misfiring on 6 and 8. No real spikes or lows on power balance and no other codes. What else should I be looking at ? It's been a long ordeal !
Autoenginuity. Only those 2 no matter what I change around. Only at idle too , if I rev it even a little there are no misfire counted. Starts fine but white fuely smelling exhaust until warm.
Changed from looney pct to stock to aggressive tow , retested and no misfires ? Truck was warm at this point so no smoke. Could waiting 2 months with injectors out and batteries disconnected affect the tuning ?
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