09 prostar with ISX randomly shutting down

[in2trux]

(02-08-2017 )09pornstar Wrote:  One question. Is the fuel actuator selenoid supposed to get burning hot? That is the only thing that im thinking it could shut off the engine

If it's getting too hot to touch that may be the source of your problem, putting high load on thermal breaker. Fuel cut off is energized to open, normally closed at key off.
You really need to look at a schematic for your truck and locate all the potential problem spots.
These are the little things that spending an afternoon on a warm day are well spent come February.