2008 Chevrolet 3500 duramax reduced power keeps popping up randomly. 160k on truck, NO CODE comes up. However while driving and logging data, I can clear the "reduced engine power" by clearing all DTC's even though HP tuners is not showing any code?
Some times it comes back in one to two seconds, I can clear it again and it will go for days without coming back?
very frustrating. I have searched and searched but not getting any real good information.
Does anyone know if the TPS reading in HPtuners scanning should be static at 13.7 (once in a while it will jump down to 13.3) if it is reading TPS it should be moving around with throttle position I would think?
The throttle pedal was replaced at one point by previous owner. I have been trying to figure out which wire sends tps information that I am seeing while scanning but no luck yet.
MAF has been replaced.
Is there a separate TPS on the intake? I have searched the internet but have not found anything for a diesel tps other than some sites have tps/app as the accelerator peddle assembly. Are they both located there?
Thanks