Died while running and now no start
I am posting this for a friend. He has a 01 4x4 with antitheft. My buddy just bought this and he bought my old super chips programmer off of me. We programmed his excursion and ran fine for 3 days and then it died when driving down the road and now no start we can get it to start every once in a while put dies within 30 seconds or when put in gear. We have cleared the codes put the ex back to stock, changed the crankshaft position sensor, disconnected the batteries for an hour, and still no start. At this point we have no idea, we have talked to a couple diesel mechanics and they are clueless.