Diesel Systems

I found the problem, it was the gpcm. Evidentally it was shorting out inside. I'm damn near bald after this one.

I just got an '03 F-250 in that is going to idle under acceleration. No codes, latest program. Truck runs great then cuts to idle, glow plug light comes on, coolant temp gauges drops. When I let out of the pedal and get back on it the truck takes off. I cant get any good readings though due to the PDS losing communication while it happens. Any further info would be great. Jon

Hi there, I have a 1995 F350 7.3 in the shop and its got an issues that I havent run across yet. Customer complaint is intermitent loss of power and rough idle. I finally verified it. Truck will be running smooth and all of a sudden its like you cut 2 cyls out. Check engine light will come on. Truck will run rough for a few seconds and then smooth out. When it smooths out the check engine light will go out. What really has me scratching my head is the first day I had it and it was doing this it absolutly would not set a code. After I messed with it enough it finally set a P1668 Pcm/Idm communication problem. I ran the pin point test, EF circuit seems to be ok. I tried a spare IDM that I have and no luck. I monitored pids and didnt see anything out of the ordinary. Any help would be greatly appreciated. Jon