I just recently top swapped my grand prix gt and all was good for a day. i had a rocker pop off so i had a cylinder 6 misfire. Fixed that now i have a random one. i no its cylinders 2 and 3 cause i had a friend at gm use a scanner that showed which cylinders were missing. I have brand new autolight 104s gapped .55. New wires, coils and i have tried different icms. I have also tried moving fuel injectors around but it doesnt seem to be working because when i pull the injectors of the cylinders the idle doesn't change. But when i swapped them then pulled the suspected injectors off the idle dropped and got ruff so i wouldn't think they are bad. Compression check was good. Fuel pressure was good. Anyone else had this problem and found out why. Could it be my ZZP pcm tune.