Can't believe it the truck was running great even on the freeway yesterday with the air on. Left my moms house this morning and on the freeway going 65/70 it started loosing power and backfiring and the temp went to 204 with nothing on. The water is full but to dark to start checking I hope it's the fuel filter but with the carb. rebuild it should be new and i can tell if it's been replaced if not what a jerk who did the work. Hope I can find it quick. It idles fine. Any ideas what to check?:dontknow: I will start looking after work I'm leaving Thurs. for Pismo I hope.