I bought my DP from one of my buddys with a 97 PSD and put it in my 96 PSD. he had his costum tuned for HPOP and injectors, and my truck is stock. I sent it off to DP after:help it being in my truck. it ran fine on 80hp tow but on 120 it would fall on its face. i sent it off and got the 80hp 120hp and 140hp and now when it warms up it is worse than it was before. I talked to james from DP and he said i need to check my fuel preesure, and i may need to get a new fuel pump. anyone have any other suggestions?