I've got a 2000 f350 7.3 with 265xxx on it. It has no codes. So what it doin is you can run it at low rpms with no problems but whenever you run down the road for 10 min it starts skipping and looses power. If I pull over and let it idle or kill it and cycle the key it will fire up and run rough for a little wile then go back to having no power and it will die. I beleive its fuel related. Btw forgot to mention the truck was sitting for a few years. I have replace the fuel fileter and drained the old fuel and refilled with new along with diesel kleen. I am going to drop the tank tomorrow and check the sock on the intake tube. I was told this would cause it to do this. any help Is much appreciated