I drove my D about 30 miles had lunch then started back. It was about 95F outside. Then on the highway it had trouble as if it was running out of gas but you would stomp the pedal and it would be fine. Got into town, and it would barely go the it died. Hauled it home on a wrecker. It sat for a day then for fun I started it up and took it for a short spin. Everything was fine.
I have Hervey's fuel pump, new filter, and accumulator. My question is can the heat pump just over heat not work?