I have a 2007 Chevy Silverado 1500 6.0. I just recently had my lifters replaced and today i developed misfire code p0300. after checking everything out. I've found that I have loss of power to coils 6 and 7. I did the switch out thing and the coils were good, but there not firing. i went through all my fuses and none are blown. i even played with the wiring harness (moved it around) and nothing changed. I did notice my negative battery wire was a little loose, so i tightened it but nothing changed. I,m charging the battery right now.
do you have any ideas of what can be the cause of my misfire of coil 6 and 7?
no other codes accompany my p0300 code.
please any advice will help
Okay, misfiren doesn't necessarily mean the spark plugs aren't firing correctly. It means the fuel air mixture inside the engine is not firing correctly. You could have bad fuel injectors on that. You could have a blowing head gasket on those two cylinders or the lifter job may have been done wrong or have bad parts on those cylinders. Good luck
