I have found the PCM is not grounding the ignition coils for 4 of the 6 Cylinders. Cylinders #1 and #6 are the only ones being grounded by PCM. I have scoped the cam and crank sensors, swapped coils, checked all related wiring from PCM to coils and sensors and all have checked good. PCM ground and powers supplies checked gOod also. I had concluded it was a faulty PCM and had it sent off for repair. The Chrysle PCM repair shop said they found no internal damage and supposed it must have had a virus from what I told them. They tested it and updated the software. I installed it and found I still have the same problem. I'm at a loss for ideas now. An important note is that the vehicle had a used motor installed prior to the problem. The owner of the car said it ran bad after the motor install but he was able to drive it home and it hasn't ran since. The car will run on 2 cylinders but on if it is started cold. After it is shut off it won't start up and will only crank over. I have let it run on 2 cylinders for over 5 minutes straight and it won't set a CEL and have viewed the misfire monitor via my snap on verus and the monitor doesn't register any misfires thought its blatantly obvious. Please help me!
Saturday, March 17th, 2012 AT 3:45 PM