04 F350 4X4 6.0l diesel. Pulling a trailer up hill running fine. Got to the top and shut down would restart and run for about 5 seconds and shut down again. Ck with scanner and got code for crank/cam sensor. Changed and tried again, same. Tried a computer from a running truck, same. Checked wiring to and under valve cover, OK codes come back after clearing for cam/crank sensor.