Engine/Transmission (1998.5 - 2002) What do you all think is going on??

[SGrooms]

Tried the grid heater thing, and it doesn't seem to be the issue.



When I am driving down the road, it seems like a big hand is holding back the pickup. I press on the accelerator, and it picks up just fine, but pretty soon it seems to bog down again.



Fuel pressure is good... any ideas????

 

[TradedV-10foraCummins]

What is the grid heater thing that you tried?



Without anymore detail, it sounds like a bad APPS (Accelerator Pedal Position Sensor). When mine went bad the truck would bog really bad at the normal cruising position of the throttle pedal, but if I floored the truck it would accelerate fine.



Another possibility could be a bad MAP sensor.

 

[SGrooms]

The grid heater thing is that I unplugged them thinking they were still cycling.



The TPS makes sense. When I was on vacation, I experienced a dead pedal and tried the unhooking the batteries and "retraining" the the TPS. Seemed to work for a while, and maybe I need to do that again.



Thanks!