[NC_John]

Mixed results today but I suspect my pcm is on the way out.

Prior to hooking up the tech 2 I plugged in a fuel pump relay and the truck started normally and repeatedly. Hooked up the tech 2 and was able to start and stop the fuel pump at will. BUT, I kept having communication errors with the tech 2 and at times the idle would get very rough.

That worked until it didn't. Without changing anything, I've since lost proper operation, truck won't start, can't control the fuel pump through the tech 2. I pulled the seat out and have gone through all the wiring at the harness. Everything looks lovely and I can't find any problems.

I'm thinking I have a ground or power issue within the PCM and just going to get another one. I hate to buy one for nothing and have to get another HP Tuner license for it but can't really think of what else to do.