Just bought 1999 cummins 3500 and its throwing code saying bad throttle position sensor. I have replaced but the truck runs perfect and then all the sudden goes to idle. Pressing the pedal brings it right back and runs until next time it does it. I have checked wires and voltage. Please help!

 

defective apps?

 

i have replaced the tps twice if thats what ur saying. Any other ideas?

 

vp44 might be on its way out then...

 

44 pump is brand new also