My Duramax seems to be gettin weak. I had a injector problem a year ago but it went away and never had it checked out. If I were to buy my 00 ford powerstroke back I know that truck would leave my duramax in the dust. That would be both of them stock also. Could the injectors be out of timeing and cause it to loose all its power and fuel milage? How can I tell the injectors are out of timeing, and if I take it to the dealership to have them check the timeing is it something that can be done fast or will I have to leave it there over night?When I bought the truck I never got to take it over any big hills so I couldnt compare to my ford. I was exspecting alot more when I bought this truck and now Im not so sure.