Originally Posted by bushwacker
let me start by saying it just shut off while driving down the road and want start back. I have replaced the ip its a rebuilt one with a new pdm.I installed a new crank sensor. I installed a reman ecm. It turns over good has good compression but want start. I checked fuel pressure @ the tee fitting and its good i even strait wired the lift pump i let it run constant while trying to start it. Its getting good fuel to the ip but none coming out of the ip. On the harness going to the ip the red wire has 5.5dc the pink wire has 12.30 the lt green pin c is a ground and the lt green pin a only has 0.3 while cranking it. The new ecm i installed didn't come with the prom i used my old prom. I have checked all the fuses and all the connectors and inspected the harness what am i missing please help. The truck is a 94 2500 6.5 turbo with auto 4x4 with 160,000 its all stock as far as i know i've only had it about 8 weeks it ran great no issues till last week when it shut off it was like it run out of fuel no strange nosies or nothing it just shut off and i've even put more fuel in to double check that the gauge is working i dont no what else to do i think i've done replaced everything well everything except what is wrong with it. Thanks again for yalls help and i'll keep you posted with what i find.
Well, since you've already changed everything expensive, I've only got two suggestions for you;
1. clean the PCM ground on the passenger rear side of the manifold:
High resistance here can cause the symptoms you describe. Clean teh other grounds as well
2. Ignition switch. These deteriorate over time and cause all kinds of weird issues.
That's about all I've got.
Boy, are you going to be some mad if you clean the grounds and it starts!
I would be if that fixed it after spending all that dough.......