After idling for some time, maybe an hour in cold weather, we went to back it in the garage and the gas peddle would not respond and the truck was idling rough. After shutting off and starting it again it did the same thing. Let truck sit for a few houjs and restarted and it was rough at first then smoothed out. Gas peddle would work. So far it is running fine. No check engine lite came on and this is a diesel.