Had this problem about a month or two ago as well.. Unplugged the fuel heater then and ran just fine after that.. Went out this morning.. And No Wait to Start, AGAIN! DP Tuner didn't "turn on" again either. It did get to -20 last night and sitting steady at -19 right now; but had truck plugged in..

Would gelled fuel cause this problem? I doubt it. But that was my first guess and to just wait to try again after the temperature went up! Thanks for any info!

 

I think that is a pcm problem. Could your chip have came loose out of the pcm? Do you have it taped in?

 

Check all your fuses...