Join Date: May 2011
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You have an air leak on the fuel return line. Park the truck on a slight down hill with the front of the truck pointing down. If the truck starts right up, you have a leak. Next part the truck with the front pointing up hill, and it will be hard to start. You can bump the starter, but do not let it crank, this will cause the fuel pump to run for about a minute, do this a couple of times and the truck should start right up.......AIR LEAK. To repair, check the banjo bolts to make sure they are tight, one on the injection pump and on the back of the head, also check to see that they are dry, no weeping. Also check the T fitting on the side of the block at the back of the engine for the same issues. The O-rings (rubber bushings) dry out and go bad. You can buy these from Cummins for about ten dollars each or you can buy them from Parker fittings who makes them for about fifty cents each.....I believe that they are 3/16 or 1/4 of an inch (cant remember) and are called Vibra loc. All you need are the bushings.
Extra note. If they want you to order a package of fifty or a hundred, ask them for some samples, I got mine for free.
2000, 2500 4X4 LB, Adrenalin 6X11 injectors, 62-68/12 FMW, 4" exhaust, 2012 T steering, Allison transmission, w/271 Transfer case, 19.5 wheels and tires, 3rd gen brakes, DT Radius Arms, Hamilton 188/208 cam, studs, 19.5-1 pistons, Dana 80, 60 Gal fuel tank, +.