A friend of mine has a 1996 Plymouth Grand Voyager SE. It has the 3.3L V6 and 220,000 miles. The transmission had been rebuilt 4 times(I went with them the last time and asked what type of fluid was being used....dexron of course)Anyway, it began having an issue. When the engine was cold, it would start up and run fine until it warmed up to open loop then it would start missing and bucking. Turn it off and let it cool down then it would start up and drive fine until warm and repeat. They had the BCM and PCM replaced (i'm not sure who diagnosed those as the culprit) and it still did it. I told him I'd take a look at it. I danced the key and got code 43(the ignition coil driver circuit is open or shorted) and random cylinder misfire and something about the cam sensor. It's been awhile, I can't remember. So I started with the simple things...well not so simple in this case...I replaced the plugs, wires, and coil pack....still did it and still got code 43 with the new coil pack. A friend of mine has a Snap-On Modis so I got it hooked up to that and test EVERY single sensor on the engine manually, they all tested fine and seemed to be working correctly according to the Modis. It eventually got to the point where even from cold it would misfire and when it warmed up it would stall and was almost impossible to keep running. Alright so far its had a PCM,BCM,plugs, wires, swapped cam sensor with the one from my van(just to eliminate the possibilities), coil pack and had all the sensors tested with the diagnosis mode on the Modis. It only got worse. It wouldn't run on all 6 cylinders at all anymore. I did a compression test and leak down test....all was well in that area and also checked the timing. NOTHING!!!!! I decided maybe it was the wiring. Went to the junk yard and found a '96 voyager with the 3.3 and pulled the entire engine wiring harness from it. I first replaced the section of the wire harness that goes to the fuel injectors, coil pack, and other sensors and when I started it, it ran perfect....until it warmed up, then it was missing and hard to keep running. Once cool, I started it again and it was back to full time missing from cold. I got out my service manual and my multimeter to check the wires between the pcm and coil pack and cam sensor. All at correct specs. Now it won't start at all. I am LOST. I haven't ever heard of such an issue with a vehicle except at carcomplaints.com where someone with a '97 t&c had the same problem but gave up on fixing it. This guy loves his van but I'm afraid I don't know what to do. This isn't so much as a "help me" but a very entertaining story. :ask_wsign :ask_wsign :nut: I did also replace the coolant temp sensor for the h3ll of it. Anyone ever heard of such a headache from a 3rd gen?