I’ll try to explain this as quickly as possible. Guy brings me a truck for a bunch of maintenance, cluster repair, and a few other things. He tells me that from time to time he feels like it’s gelling up. Come to find out it’s the classic “tractor mode“. Every time it has happened to him he says he pulls over, turns truck off for 5 minutes, starts it back up and it runs great, he doesn’t touch the injector wires, no problems for another few days to weeks. I’ve had the truck here for a while and I have started it and ran it numerous times, and even had it idling for quite a while as I was setting up a new radio that I installed for him. Truck hadn’t moved since then. A couple days later I start it up and it goes into tractor mode immediately. The codes in title all are on. Truck has harness updates on #2 & #7. I ice picked 2 first, cleared codes, started it, tractor mode, 3 & 5 pop back up. I ice pick 2 again, 3, 5, & 8. Clear codes, start it runs fine for 5 or 10 seconds then tractor mode. I re-crimped the connectors for #2 harness, wiggle wires, pull FICM harness, check for continuity, and voltage. I’ve checked for rub through and there isn’t any.
Basically where I’m at now is the truck will randomly go into tractor mode with what seems to be no rhyme or reason. I’ll start it, it runs like crap, off and on again runs ok for a few seconds then tractor. Off and on again and it runs great. When it is running good I can wiggle all the harnesses and it will not trigger the codes. It’s so intermittent that I’m a bit lost. The only other issue is the batteries do seem to be getting weak, but i wouldn’t think that would matter if it goes into limp mode while he’s driving. One last note, when all the codes pop up, I also get glow plug P0672, 74, 76, and P0101 MAF circuit out of range, however, when truck is not in limp mode there are zero codes. Any thoughts?
Basically where I’m at now is the truck will randomly go into tractor mode with what seems to be no rhyme or reason. I’ll start it, it runs like crap, off and on again runs ok for a few seconds then tractor. Off and on again and it runs great. When it is running good I can wiggle all the harnesses and it will not trigger the codes. It’s so intermittent that I’m a bit lost. The only other issue is the batteries do seem to be getting weak, but i wouldn’t think that would matter if it goes into limp mode while he’s driving. One last note, when all the codes pop up, I also get glow plug P0672, 74, 76, and P0101 MAF circuit out of range, however, when truck is not in limp mode there are zero codes. Any thoughts?
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