big thanx to all that helped with my problem on my 05 it was running good then once it got heat built up ran like crap after a in tank lift pump pressure regulator swith, new 1200 dollar cp3 . rail relief valve. and every other possible thing . i got a reply from a guy on sayin he had bad injector tubes and his did the same thing figured what the hell tried everything else and went to do a test and found two of the lines to be a couple half turns loose on the injectors ended up being the evil lil demon itself haha but thanks again