truck bucks and has no power

[RWherley]

I have a 04 3500 with the six speed and the 325HP engine, every once in while the truck starts to buck reving up and down by its self, and it has no power one it dose this. I checked the codes and i keep getting the same ones, P2121 Throttle/pedal position sensor/Switch "D" Circuit range/performance. P2127 TPS Sensor/Switch "E" circuit low input. P2122 TPS Sensor/switch "D" circuit low input. Like i have said I have had this happen before and have replaced the TPS 3 or 4 times and it goes away for a while after changeing it. I have also found that by unpluging the TPS and pluging back in it acts the same as if i had replaced it. The truck has 260k on it do these burn out that fast or do i need to look for some thing else? Thanks for any help

 

[LNaugle]

seems like when u move the wiring harness it fixes it self for a little bit?

 

[RWherley]

I ran down the wire harness and found two bare wires and fuzzy ground bolt, and replaced the TPS now its running ok, I think the wires killed the TPS.

 

[RWherley]

So the truck ran ok again for a little but now its acting up again its been to the dealer and they cant find any thing.