Ok, have a friend who just bought a 2001 cummins and was driving it down the road and applied the brakes to stop and the truck died.. The truck had 1/4 tank of fuel left.. He thought maybe it ran out of fuel.. Filled it up, bled the system, Just cranking no start.. Checked all the fuses, good.. Has a fuel pressure guage hooked up and is getting no pressure while cranking, but as soon as he stops cranking the guage reads 7-10 psi... Any help is appreciated, the truck is dead in his drive and needs to get it going...