Ok, new to the forum. Ive run myself into a corner not knowing what to think about this. First off there are NO CODES. Except the evap purge solenoid. When driving it constantly feels like the truck has low power. In overdrive, pulling a hill and it feels like someone threw a boat anchor out the back. Truck slows way down while im gradually pushing on the gas. Feels like fuel IMO. Studders and slows way down until finally it downshifts and gets its butt up and moving again. Now. . .things i done or tried.
1. New fuel pump assembly
2. New plugs, wires and coils
3. Gutted cats
4. 02 sensor(cause it had a code for bank 2 sensor 2)
5. Cleaned throttle body and maf
6. Removed and cleaned injectors and rails
7. Double checked fpsi 60psi across the board even during hesitation
8. Checked compression all above 160psi
9. Sprayed brake clean all around intake(no change)
10. Cleaned ground on drivers side frame
11. Checked continuity in coil harnesses.(changed harnesses) no change
12. Swapped new coils with a friends good ones just to see(no change)
I am at my witts end!

 

Knock sensors

Tim

 

X2 on Knock sensor, I would also check Intake Gaskets and Exhaust Manifold bolts, they could be on the cusp of needing replaced but not throwing codes. What year and Mileage?

 

Just had the same issue in my 08 SUT. Turned out my truck had active fuel management and it just messed up with no sign of anythinggoin wrong. I just had the top half of the motor rebuilt. Cost me 2800

 

I had to lifters stuck on the passenger side

 

My truck was throwing the same code for the O2sensors bank 2. From everything you have said I can almost guarantee you have some lifters stuck

 

Davide Paige. Thank you. I have yet to pull the valve cover off. Im just not hearing any noises. I would think there would be a pretty good tapping noise if lifter were stuck. Ill check it out as soon as it quits raining😡

 

I never heard one noise out of the ordinary either. It just went out

 

Not relevant. Btw, "sticking" lifters are due to lack of maintenance. Change the oil when dirty and all is good. If you forget to change your oil, flush the engine, and all is good.

 

keep me posted, i'm having a similar issue.