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2006 PSD 6.0 temp problems
Rig: 2006 F-350 4x4, PSD 6.0, Crew Cab, right at 60k mi, used for daily driving (140mi) and 4x4ing out to camp/fish (not really towing anything)
Mods: Intake, Exhaust, EDGE Programmer (didn't download the Juice stage 6), stock down pipe I think.
Problem/situation/location: AZ, Driving up a hill(less than a 6% grade) no more than 2mi in length, no extra weight, cruise control engaged at 65mph, outside temp was 68deg F. Information screen beeped and indicated "check engine temperature", I looked at my stock temp indicator and pulled over since it was up at the top of the hot area. Shut the truck off after a second and popped the hood. Overflow tank had vented into the engine bay and was a little low. After I filled it back up(less than 1qt.) I proceeded to drive the rest of my trip with no problems. The next day before starting the truck again I checked my coolant and added just over 1 gal. Truck has had no other symptoms of overheatting since the dummy light, I tried to reproduce the problem and went up 7% grades without a hiccup. I was thinking the thermostat might have been stuck, but I'm new to diesels.
Has anybody else had this happen? Or know what to do about it? Just seems odd that I've driven through 2ft. of sand for an hour without a problem, but a little hill does this.