So i drove my GTO down to Georgia where i will be for the next thre months and now its running really rich on one bank and misfiring. Its an 04 with long tubes, no cats intake and ported tb and tune. The whole driver side bank is really rich, i pulled the plugs and they are just completly black and i can actullly see the gas coming out the tail pipe. I replaed all the plugs and wires twice. the car seems to run fine at wot, it just idles ruff backfires(but rarely) and seems to misfire if i cruise around 2000rpms. What would cause the whole bank to run this rich, would a bad pushrod or valve spring cause a whole bank to run like this. I am in georgia with only a craftmans 50pcs tool set and can really find noone to help, i took it to a dealer but they had no clue and just wanted to put [parts on it till it solved the problem.
well if you dont fix it i will help when you get back.
scan it with Atap,HPT,EFIlive,techII,good snap-on/mac scanner. check what the 02’s sensors are doing. For the LTs do what did you do for the 02 harness.