Just wanted to say sorry to all that sent me help with my motor problems. Fixed the problem and got to doing other things and forgot to let everyone know it was fixed. Thanks to their help. It turned out to be my "temp sensor unit" that went bad. The thing that threw me was every time I put the engine "Analyzer" on the truck, it said the temp. sensor was to low. Well to me, that meant the engine temp. sending unit was bad. Well like you guys said, the engine temp. sending unit is different from the engine temp. sensor. I guessI am just to old to really understand what all the engine sensors have to do with the running of the engine. Anyway, just wanted to say thanks to all that tried to help.