I have been looking at getting a new alt since this one seemed to be dropping voltage pretty quick. Well I was doing some work on the engine getting it ready for the summer , you know replacing hoses and the belt. While replacing the belt I noticed that the idler pulley was tight (89 TBI)and looking a little closer I could see where things where starting to heat up ,the pulley was starting to deform. Replaced the pulley and things are back to normal, well sort of......


The volt meter on the dash shows to be charging at more than 13.5 volts when I first turn on the truck. After the truck has been on for a while it shows to be charging as low as 12 volts. The thing is that I hooked up my volt meter to the battery and then to the alt. and they both show to be chargeing at 13.5-13.90 the entire time which I think is fine. I guess its time for a new dash gauge.