Alright. This isn’t good. Truck is still acting up. It’s only when the truck is fully warmed up and has run for about 15-20 miles or more. It acts like it’s running out of fuel. The key switch was bad for sure but not the culprit of this issue. Now to pull my chip to see if that’s causing the headache. I’m afraid it might be fuel pump or worse. The CEL comes on still after shutoff but clears when the truck is restarted. My code reader won’t connect to this truck since it’s a 95 and not a 96. Any more suggestions gentlemen?
Do you get anything besides just the CEL when the truck dies....such as other indicators similar to when the ignition is switched to on (WTS, etc) ? Could very well still be the chip acting up.
If it still occurs with the chip removed....
Stalling with a CEL indicates something that the PCM can monitor. It doesn't monitor fuel pressure. If you think it is fuel pressure try checking the screen on the side of the fuel bowl for debris. Has the fuel regulator ever been rebuilt?
When the truck stalls again, immediately remove the inspection port on the HPO reservoir and see if the oil is no less than 1" from the top. If it is your LPOP could be failing and not able to supply the HPOP with oil causing the stall...which would act just like running out of fuel.
Other possibilities....weak injector o-rings that begin to lose pressure as the engine warms up
....faulty CPS
....faulty IPR
Ideally you should get a scanner that can monitor and log what is going on when it dies so you don't keep throwing parts at it. I use autoenginuity and it paid for itself many times over when dealing with issues.