2010 Peter 389 dash glitching

[Billcummins6]

Morning,
I have a 2010 Petertbilt 389 with a Cummins 871 in it. My dash glitches, gauges will reset as I'm driving down the road. Its almost like cycling the key on. The cruise and Jakes will sometimes shut off if it gets real bad. It seems to do it while goin down a hill coasting, not while I'm under power. I've replaced the ECM twice, body controller and engine wiring harness..
Yesterday I hit a decent sized pot whole on the 40 in Flagstaff and the truck shut off on me. After I got stopped and checked everything out, it restarted like after a service (sounded fuel deprived) and ran smooth. It threw a code for a key off and low fuel rail pressure. I stored and cleared the codes and its been fine for the last 100 miles.. I have a good video of if i can figure out how to post it. Fuckin trucks, totally frustrated...