Recent content by shauno

  1. S

    Bet you cant figure it out - SOLVED

    Sorry guys quick update on this mess. So out of frustration I pulled the head . This is the lifter on 3 that was causing all the issue . Never made a noise or a tick . The retainer came apart and was making the valve appear to be opening and closing properly with the cover off but it was...
  2. S

    Bet you cant figure it out - SOLVED

    As an update today I pulled the entire fuse block and replaced it with a known good block same issue as before . I did remove all the fuses from the original box and disassemble the board to clean everything . Then reinstalled all the fuses back and installed the clean box back into the truck ...
  3. S

    Bet you cant figure it out - SOLVED

    Yeah unfortunately I dont have a scope and its not an internal short in the computer it self it has to be something external that is pulling the ground away from the injector signal wire .
  4. S

    Bet you cant figure it out - SOLVED

    I have a full set of new injector that were installed with the same issue . Best i can determine is something is robbing power or signal from the drivers in the ecm but not 3nough to damage the ecm it self .
  5. S

    Bet you cant figure it out - SOLVED

    Ive checked the pigtail connection to the injector . Either way my noid light fits firm in the plug and ive wiggled it to double check it wasnt loose . To address the voltage drop across the circuit ive put a jumper wire to the injector with direct power to rule out injector 1 pulling amperage...
  6. S

    Bet you cant figure it out - SOLVED

    The oil pressure definitely is not the issue . 6l80e sorry typo .
  7. S

    Bet you cant figure it out - SOLVED

    Oil pressure is 55 60 cold 30 35 warm all at idle . Off idle pressure is over 40 warm at 1500 rpms. The miss is constant at all temps . Off idle it is less noticeable and slows on the scanner with rpms The timing assembly is new and the cam and lifters are new all gm . No vvt installed...
  8. S

    Bet you cant figure it out - SOLVED

    Ive checked the injectors even moved them in the rail to isolate a possible issue . The fuel trims dont show enough of a variant to warrant a lean or rich code so even if the ecm was set to shut off an injector there would need to be a correlating code to merit the action . The nock sensors show...
  9. S

    Bet you cant figure it out - SOLVED

    Case relearn? . Do you mean crank sensor The injectors have been swapped around and no change.
  10. S

    Bet you cant figure it out - SOLVED

    So I have searched and read for days but I hope we can figure this out and help others who have had a ghost like this . Let's start with the vehicle 2009 yukon xl 5.3 4l80e The issue is a miss at idle that slows off idle Yes the afm has been deleted with gm parts My background is cars . I was a...
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