dhession13
New Member
- Sep 7, 2025
- 1
- 0
- Truck Year
- 2016
Hello everyone, seeing if anyone can help me figure out an issue with my truck. I have recently bought this truck and Im having issues. Truck starts, runs fine. Truck runs up and down the road fine. I have no issues when accelerating 50-60% throttle. Anything over that the truck developes a shutter.
I have a snap on triton. with that I can see fuel rail pressure actual vs commanded. HPFP will hold rail perfectly till around 20k psi. Then it drops. What is weird is that if i remain in the throttle and push through the shutter I can see the HPFP reach 22-23k but it is usually 9-10k short of what desired psi is.
I have hooked up a gauge to test the intake fuel pump. Its a harbor freight kit but i get consistant pressure around 70 ish psi. Which from what ive read is within range of a good pump.
Im at a lost on what it could be. The HPFP looks to be replaced at some point recent. its shiny in color when everything around it is oxidized aluminum.
With the scanner I can also see injector rates. I have no outliers all six injectors range from .2 to -.2
Any help would be greatly appreciated. This forum has been super helpful to get this far hopefully someone on here can help me get this thing going. Thank you
I have a snap on triton. with that I can see fuel rail pressure actual vs commanded. HPFP will hold rail perfectly till around 20k psi. Then it drops. What is weird is that if i remain in the throttle and push through the shutter I can see the HPFP reach 22-23k but it is usually 9-10k short of what desired psi is.
I have hooked up a gauge to test the intake fuel pump. Its a harbor freight kit but i get consistant pressure around 70 ish psi. Which from what ive read is within range of a good pump.
Im at a lost on what it could be. The HPFP looks to be replaced at some point recent. its shiny in color when everything around it is oxidized aluminum.
With the scanner I can also see injector rates. I have no outliers all six injectors range from .2 to -.2
Any help would be greatly appreciated. This forum has been super helpful to get this far hopefully someone on here can help me get this thing going. Thank you
