I have a 2001 Jeep XJ 4x4 and it has been a never ending pain in my butt After fighting and finally fixing wonderful misfire issue I now have a bigger problem. I went to start it and when the key is on but not running the fuel pump, a/c compressor clutch and cooling fan turn on and off. When I unplug the PCM it stops. I checked the grounds on the black PCM plug and they are good but the 5 volt prong is reading 9 volts when the key is on. I have a factory service manual and everything points to the PCM. Is there any way to get the PCM checked out? Can I plug a 98 PCM in to troubleshoot? I know it won't run with a 98 PCM. Can I have a 98 reflashed to work in my 01?