Can't seem to figure this out

[smokin stroke]

Heres the problem, at about 32-3800 rpms the truck stutters and coughs until it shifts. It won't boost over 25 psi when this turbo should make 35 easy. The truck has dual hpops, stage 2 injectors, fass fuel system, modified stock turbo, dp tuner and sinister fuel return kit. I have tried putting a regulator on the map sensor and changed several different tunes but the truck still continues to stutter. Any help or suggestions would be appreciated. Thanks, Ross

 

[Gotti2k7]

Heres the problem, at about 32-3800 rpms the truck stutters and coughs until it shifts. It won't boost over 25 psi when this turbo should make 35 easy. The truck has dual hpops, stage 2 injectors, fass fuel system, modified stock turbo, dp tuner and sinister fuel return kit. I have tried putting a regulator on the map sensor and changed several different tunes but the truck still continues to stutter. Any help or suggestions would be appreciated. Thanks, Ross

I had the same problem with my DP tunes. Like it would hit a rev limiter before it would shift. I sent it back 3 different times to fix the shifts. And it never was right. Fuel pressure stayin up at those RPMs? My tunes from Beans, fixed any hiccup i had.

 

[greenbeast]

Could be a problem with ICP at that RPM floating the popetts in the injectors causing it to studder.

 

[fastbarry]

i would say it could be icp related or bad tunes on the chip.

 

[smokin stroke]

well its not icp related, i thought it sounded like floating valves so i put tighter springs in and that didn't fix it. it almost sounds like it running out of fuel, but oil and fuel pressure are both great. so i guess i have it narrowed down to injectors so there coming out to be tested.