So took the truck out today and was going over the canyon. on a pretty steep grade the truck was going above the line just above middle on the factory temp gauge. I have never had it do this tell lately it has been with the ac on I am also seeing about 1000 degrees on the egt this is pre turbo. The truck has the fuel and power screws turned up, fuel pin is ground some, hx40 turbo, 4 inch turbo back exhaust and the truck has 325000 on it now. This was all empty to no load at all