Hi, I'm a newbie here, but my 99 dodge 2500 has no power on hills, and very bad mpg 12 mpg. Just turned 240000. When I run up on a hill, it goes good if I get a running start, then I run out of power, if I slowly back off the throttle then slowly push back in it will pick up, but not much. The in-tank lift pump was replaced with a raptor 100 with big line kit, stock fuel filter replaced with napa bolt on filter with screw on filter. Otherwise its stock. I apologize for the lengthy post I hope to find some answers tho. Thanks in advance.

 

Something similar its happening to mine, (manual tranny) i have a AirDog (R3SBD100) in it and a brand new vp44 with 100hp inyectors, but when i start letting the clutch go, engine revs up and no much power converts to the tranny, so needless to say i feel no torque at all

bad clutch?

 

After several hours of diagnosis I found the turbo to be producing around 8psi when under a hard pull. According to what the Dodge dealer, it should be pushing 22 lbs under those conditions.

 

Could possibly be leaking connections down stream of the turbo. maybe waste gate issues. well thats my 2 cents worth of guesses. good luck.