no pulling power

[Chuck32]

I have 96 3500 6.5 tubro and it has no pulling power at all it does not matter if am pulling a 10ft 1000lbs camper or 25ft 6000lbs camper with gas paddle to the floor all I can get is 50mph 2500rpm and 9 boost and stops there forget climbing any kind of hill have new lift pump all filters and injecter pump also trans rebulit only code shows is P571 and eng 36,000 since going though

[North Maine]

If you sustain more than 9 lbs of boost the stock program will defuel the motor. Do you notice good power and then a noticeable drop in power after a long accel? If so you have an issue with your wastegate system holding too much PSI.

[Chuck32]

yes I do what should boost be at the truck runs fantastic when not pulling anything have all kinds of pwer

[North Maine]

Boost can not be sustained above 9 PSI for more than a set amount of time (less than i minute I'm pretty sure, maybe even like 20 seconds) before the stock program will defuel the motor until you shutdown and restart. If you can not keep your boost lower than 9 psi then you need to get a boost fooler or even better a programed ECM from Heath Diesel, Westers, or Kennedy Diesel. This with an upgraded exhaust will help tremendously.

Do you have a mechanical wastegate control or is it the stock Vacuum system?

[M.Novak]

If it's stock then it sounds like the wastegate actuator diaphragm is shot or the gate itself froze up. Could also be the vent valve on the WG solenoid is plugged up and not reducing vacuum to the actuator. Otherwise he's got too much boost dialed in on the controller. Mike

[Chuck32]

it an all stock vacuum system back in the summer check light came on and code P0236 was shown but code went away the next day and could also cause my torque converter to kick in and out in OD the truck been doing that also at around 50mph but if I can get above 60mph it stays in
thanks every one for the help