I have been struggling with processor resets due to wiring issues with the ford.
It appears that Ford used a single power wire to drive all of the 12v applications on the engine, and then grounded them all on a single ground wire. Megasquirt was NOT impressed.
I picked up a spare engine harness from the junk yard and removed all of the emissions equipment wires and then provided individual power and ground to each module or sensor on the engine. Have had to go through the engine bay and sand all of the body ground points and the ground wires that attach to them- even the stock ones.
My signals are all pretty stable now, I have gotten away from the false triggering TPS, the 435 degree temp spikes, and the 3+ volt spikes and drops in the voltage to megasquirt. The processor resets are almost gone except for on occasion it will reset a bunch of times in a row for no apparent reason. I have driven the truck 60 miles with not a single reset, then yesterday on the way to work I got 12 in a row and then none on the way home from work.
Going to add some accessory grounds to the cab and battery when I get time.
This drives almost like a stock truck with more power- next up is to get the IAC working!