My 01 2500 5.9l cummins was having a hard time starting, and one morning I went out and it hasn't started since. I have since replaced the fuel lift pump, fuel filter, and injector pump. I bleed filter housing, then the injector lines. Thing still won't start and is not throughing any codes at all. Does anyone have any suggestions????

 

there is a pressure port on the injection pump also. bleed the filter port, then the injection pump port, then crack open #3 and #5 injectors. if that doesnt work check the fuel system relay under the hood in the fuse box. u can swap it out with the horn relay. good luck.