papamac816

hello, I believe all the cylinders are misfiring. I have replaced all the coils wires plugs . when it's running bad it is showing every cylinder code . I have considered a new wiring harness. but there appears to be no damage to it. and this morning my friend tried to move it and it is running poorly cold . I do need to recheck it I may have knocked something loose yesterday.

I have a 2005 suburban 1500 4wd automatic trans 5.3 . the truck was hit on the front passenger side. I replaced body parts . air bags did not deploy. Steering column bearing are loose from impact.. radiator support was pushed back but no damage to electric fans radiator or condenser . it ran good for a month. now it runs perfect at startup. when it warms up it misfires terrible. can not be driven. I have replaced y pipe and cats. all 4 o2 sensors. plugs, wires , coils , crank and cam ,oil sensors. visually checked wiring harness found no damage. only codes show all misfires when it starts to run poorly. checked for intake leaks with carb cleaner . it does not have egr.