driving me nuts 01 2500 5.9 gas stalls while driving in the mid day heat. does not stall in the morning or in the evening.

when it stalls out the fuel, oil pressure, temperature, and voltage gauges do not move. on the mileage counter mileage blinks 6 times then it says no bus. let it sit for 5 minutes all the gauges come on, and it starts. unplug the coil tested it with testing light have no power until the gauges come on.

at first I thought it was the fuel pump. installed new fuel pump not the problem. replaced fuel system relay. checked all relays, and fuses replaced battery terminals, and connectors. removed and cleaned all grounds.

If someone could help me out would be much appreciated thank you

 

No Bus indicates a problem with your electronics. Are you getting any codes?

If I had to hazard a guess, I would say crank sensor, or PCM.

 

I'm getting codes 920 921 999

 

Where did you get them from? Can't find any of them. I've heard no buss could be a bad pcm.

 

Those are cluster test codes. They are detailed in the FSM. They mean pretty much nothing....