IPR Sensor Keeps Burning up....Help

[phahn17]

I have a 99' Ford F350 PSD and my IPR sensor keeps burning up, I will start the truck drive down the road slowly, turn around and then on the way back floor board it going about 30 and it completely burns the IPR sensor up............I'm thinking short in the line, or my computer is sending bad impulses possibly..........I've done it three times with some extra IPR sensors I had laying around the shop.....but I'm out of spare ones now, and I really don't feel like burning up a 180 dollar part without figuring out why its doing it..............help me out please