I have a 95 Chevy with a 6.5l. in it. This just started out of the blue. No symptom leading up to it. When I go out in the mourning and start the truck. It will start right up and idel, drive and everything normal. When it's warm is a different story. Once warm it will not stay running with out me on the throttle. If it dies it won't start back up with out ether.

I instantly thought the PMD was the issue so I replaced it. I also thought it might be the throttle pedal so I replaced it too. While I was there I bought a relocate kit and mounted the PMD to a big heat sink and stuck it next to the radiator where it can get air. I also tried the new PMD up next to the stock location with out the extension. No change. Still won't idle or start for several hours once it dies. I've only used ether that one time to get me home. As long as I keep my foot on the throttle it will drive fine.

Any one have any idea? I could really use some help on this. The injection pump has about 60-70k miles on it.

 

Try pouring water over the IP and starting it agin in a no start event-if that makes the difference between starting or not-yor IP is worn out.