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My wife's very clean and well maintained '97 F350 keeps dying on her now and again.
Last week I left work to check on the issue and found that one of the VC plugs was burnt. Saturday I changed the drivers side VC gasket, under VC harnesses, and one external plug. Everything seemed good, but when I drove about 2mi up the road, it died 4 different times. Twice while I was on the throttle, and twice while I was coasting. It dies like a bad CPS, but it has tach signal. That evening I had trouble restarting it each time, but it did start after a few minutes.
Sunday morning I installed a new CPS just to be safe. The truck ran great for about 15min, then it died at about 55mph going down a hill. At this point I noticed that even though the engine wasn't putting out any power, if I pushed the accelerator and got the TC to lock up, the truck smoked like it was firing, but just didn't have enough oil pressure to drive the injectors. This time it started right up and I couldn't get it to stall the rest of the day.
It almost seems like a sticky IPR, but in my experience, that usually shows up as a stall when you suddenly let off the accelerator, not when cruising down the road.
As a last ditch effort, I went ahead and cleaned up the ground wire that goes to the fender above the PCM plug in the engine compartment. I seem to remember that causing odd stalling issues when headlights and/or wipers are on. Unfortunately the truck stalled again this morning, though it did fire right back up.
Any help would be great. My wife works at a couple different horse farms and can't do without her truck.
Thanks,
Phillip
On edit: I tried to unplug the ICP sensor when the truck died on Saturday night. This didn't help with starting. Also, the fuel heater is disconnected.
Last week I left work to check on the issue and found that one of the VC plugs was burnt. Saturday I changed the drivers side VC gasket, under VC harnesses, and one external plug. Everything seemed good, but when I drove about 2mi up the road, it died 4 different times. Twice while I was on the throttle, and twice while I was coasting. It dies like a bad CPS, but it has tach signal. That evening I had trouble restarting it each time, but it did start after a few minutes.
Sunday morning I installed a new CPS just to be safe. The truck ran great for about 15min, then it died at about 55mph going down a hill. At this point I noticed that even though the engine wasn't putting out any power, if I pushed the accelerator and got the TC to lock up, the truck smoked like it was firing, but just didn't have enough oil pressure to drive the injectors. This time it started right up and I couldn't get it to stall the rest of the day.
It almost seems like a sticky IPR, but in my experience, that usually shows up as a stall when you suddenly let off the accelerator, not when cruising down the road.
As a last ditch effort, I went ahead and cleaned up the ground wire that goes to the fender above the PCM plug in the engine compartment. I seem to remember that causing odd stalling issues when headlights and/or wipers are on. Unfortunately the truck stalled again this morning, though it did fire right back up.
Any help would be great. My wife works at a couple different horse farms and can't do without her truck.
Thanks,
Phillip
On edit: I tried to unplug the ICP sensor when the truck died on Saturday night. This didn't help with starting. Also, the fuel heater is disconnected.
