Ok, here´s the deal: The cooling fan in my 98 Escort quit working, resulting in a blown head gasket. I replaced the head gasket, the entire fan shround/fan/motor assembly, the temp switch, and the temp sensor. Not, the car is running, and the temp gauge reads normally, i.e. straight up, while the car is sitting still. However, when the car is running "at speed" (30-65 mph), the temp gauge goes up halfway between normal and hot, then goes back down when the car comes to a halt. I replaced the thermostat as well, and it is still doing it. Help!!!