tuner problem

[brian89]

I just got a new DP-Tuner f8 with the rotary switch I put it on 2 days ago, drove a thousand miles with it and all of a sudden it stops working an the truck is stuck in stock tune, the pcm box is loose so i dont know if that could be the problem but a little help on how to fix it would be appreciated

[scagle1]

i would try pulling it loose again and recleaning contacts lightly and then tighten everything down , might have wiggled loose but usually a bad contact equals no start