on so i got my truck about two months ago. it had a few problems but nothing serious. a few weeks ago the fuel pressure light started to come on. i replaced the lift pump with an airdog 150gph pump. set the pressure at 24psi like the mechanic told me. now about a week of driving around town the light is starting to come on again. i put a guage on it and i have 24psi at idle, when i step on the fuel the pressure drops over 10psi. also i have very little power untill about 2500rpms. then it pulls like a train. after all this started the alternator started giving me problems, it wont charge for the first few minutes then its fine. and at times i have to crank it a bit before it will start like it has no fuel. i put a scaner on it and checked everything i can, the tps says it is at 8% with the engine off and the max i get is 71%. im sure all this is related in some way. the cummins dealer has no clue whats wrong and everything points to the injector pump. anyone have any ideas? and if it is the pump any segustions on one? i use the truck to pull a trailer so i want a little more than stock without going crazy.