Misfire After Headgasket Replacement!
About a month ago I started HG replacement on my 05 Duramax. I had heads planed, used ARP studs and put all back together with the MAHLE grade c gasket kit. After putting back together, I had an engine misfire with haze at idle which the scanner said it was number 6. I tried swapping injectors around but the misfire seems to stay with the cylinder. Checked my balance rates yesterday and they are attached. Number 6 is way out and injector 1, 2, 4, and 5 are all -7 (the interesting thing is these 4 injectors always read the exact same numbers to eachother. To clarify, they all fluctuate but they all read the same always) At first I thought it was a bad injector but now I'm starting to lean towards possibly bad wiring/bad FICM. I have inspected the normal wear spots for the wiring harness and they seem to be fine. Please Help
2005 Chevy 2500hd Duramax