Cooling, computer, sct, should I light a bonfire under it?
03 6.0 with egr delete. I just put new reman heads on my truck. I've put it all back together...again. The first time, I had the dealer flash my truck to newest strategy and found out quickly that the cooling fan was disabled. I hooked an egr valve in and cooling problems significantly diminished. I ended up pulling heads again and this time getting some remans because there were cracks in the old ones between the glow plug and an intake valve on both heads at front cylinders. Put it back together and all is mostly good. Need to adjust the 4" exhaust so it doesn't vibrate against the frame. Might need to tighten the marmon clamps on the turbo now that it's had a chance to shake a little. Maybe replace the coolant filter element.
One big problem is that I get higher temps than I want. Last time, I'd run a consistent 190-196 under all conditions in relatively warm temperatures until I hooked up a trailer. Smaller trailers would make the coolant temps go up some but no higher than 212-14. I'd have to really watch my fiver. It would pull the temps up to trouble range (220) on hills if I wasn't careful. I don't want my coolant temps to get that high ever again if I can help it. Exhaust temps were stable around 650-850 unless I was pulling a hill. Then I got as high as 1150 for short periods(duration of hill). Now I get higher exhaust temps which I attribute to higher ambient temps. I haven't hooked a trailer up yet. I won't until I get cooling resolved. Deltas have climbed from 7-10* on highway to 7-17* on highway. I hooked ae up and got no fan duty. Computer isn't even telling fan to come on at all. Fan is showing higher than engine rpms in some cases.
I noticed overfueling when running the canned sct street tune with and without egr enabled. I don't actually have an egr, just the valve installed to fool the computer. I'm also getting persistent kam error, ficm software incompatibility error, and systems readiness test incomplete. I've removed sct and returned to stock. No change in symptoms except the truck is not as fast and less exciting to drive. Want my fun smooth truck to drive again. Wondering if someone before me put a different ficm on it than what it is supposed to have. Keep in mind, I had the dealer update ecm and ficm in January. Dealer had problems getting his computer to talk to the truck. Some of it was he was not getting a good wifi signal, but even when he had it, he had to try a couple times to get it to talk to my truck. He eventually did and ran the injector balance test, compression test, and checked a couple other things after he updated my truck. After he updated, my truck ran much nicer, until the overheating issue from no cooling fan. Even after the overheating issue, things were good once I hooked up an egr valve until exhaust gasses started showing up in the coolant and causing temps to spike and then a second head gasket replacement.
Where do I go from here? I'm thinking I might need a computer or a fan clutch or a new water pump or some combination of all three. I don't really have the money to just tinker. I really need to just fix it and put it to use so I can return a car to the inlaws. I'll appreciate anyone who can help me to work through this problem.
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08-04-2012, 09:10 AM
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