I hate my first post being a thread looking for help, but I'm about to lose my mind with this Suburban.


Little back history... a little less than a year ago my truck had a cylinder 1 misfire. That ended up being a collapsed AFM lifter. So I replaced all 16, head gaskets, intake, oil manifold... all that jazz. She drove fine for a wile, then I started getting a P0300/Service Stabilitrak/etc.


So far I've replaced:
All 16 lifters
AFM Oil Manifold
Head gaskets
Intake gaskets
Cam Position Sensor
Throttle Position Sensor
All spark plugs
Did a compression test on all cylinders and none were under 120psi
Fuel Pressure is around 55psi (give or take while running)


I also removed and cleaned the fuel rail and all injectors.


I'm seriously losing my mind here. I cannot for the life of me figure out what else there is to do to fix this thing!


Any help is appreciated

 

"then I started getting a P0300/Service Stabilitrak/etc. " What I read is you've done everything, the misfire (300) follows the stabilitrac crap others have issue with, My advice post your "post" in that thread for better results.