Hello. When I bought my YJ, the tempature guage did not work. After looking at the forum, I found which tempature sensor to change. I did. It worked for one start up. After that, it pegged out. I have changed the thermostat, the radiator cap, the tempature guage, and the same sensor again. According to the Chilton Manual, my water pump and fan seem to be fine. I'm not sure if the engine is running hot as it is not boiling over. It doesn't act like it is hot. It doesn't smell like it is hot. The circuit board doesn't seem to be burned. I am at a loss. Do any of you have an idea? Thank you, in advance.