I've got this ongoing problem going on that came up after I fixed a no hot start issue, and figured I would start a seperate thread for this issue to try and get it finished off.
It started off as a slight stutter on acceleration, It was kind of random, mostly around 35mph, then also could notice it around a specific throttle position, kind of hard to pin down.
I ended up replacing the CPS
with a blue one from RiffRaff, and it made no difference that I could tell.
Then the next day, I installed a new pedal positioning sensor, and it seems like that helped a lot, but its still there. Every so often while driving, Ill feel the truck shake and stutter, but not near as bad as before.
Then I put the Black CPS
back in, thinking maybe it was causing a Cyldinder imbalance and making the truck shake. I also pulled the VSS
sensor and cleaned it off and reinstalled it at the same time. Then went for a drive, and it was HORRIBLE. Noticed the speedo jumping around 55mph, it would jump from 40->62->50->45->65 etc etc. So i knew VSS
Installed a new VSS
, and were back to square one with it happening every so often, a little shake/stutter, and a slightly rough idle. Enough to shake the truck and me in it, but still "sounds" smooth.
Has new HPOP
, new IPR
, new ICP
, new VSS
, new TPS
, new CPS
(tried both Black and Blue), all 8 injectors were tested, 3 turned up bad and were replaced a few months ago, so all 8 are acting as they should. Checking resistance at the 42pin plug on the fender well showed every injector between 3.8-4.0 ohms, so no wiring issues.
Any ideas guys?