ok last year i was having this issue, the fuel relay would get really hot and the truck would die, i switch the relay out with another and it would run again until it got too hot. i took it to a mechanic and he said it was the oil pressure switch ok makes sense well heres where im at now. its still doing it. i dont want to put the switch in and find that its something else because i cant return the part once its used. is theres anything else that would make the relay hot besides the pressure switch. what is the life of the pressure switch.