My friends truck has ben running high exhaust temps. (about 1300 degrees) while just driving normally. He is also getting poor milege and truck lost power. He took it to several Dealers 3 total and they all say there is nothing wrong with the truck. He took it to a Cummins dealer and they said something is deffinetly wrong but they don't know what. They checked the inter cooler, hoses, turbo, sensors, intake, etc. etc. and found nothing wrong. He had it in not to long ago and the dealer put a new lift pump on it and he said they reflashed the computer for some reason?? This is when he started having problems. Does anyone have any ideas what might be the problem. The dealership that did the reflash is one of the ones that said nothing is wrong with the truck. He said the fuel pressure is were it should be.
His truck is a '2001' 2500 4x4 H. O. with 6 speed trans. Only mods are 275 injectors K&N air filter, and 4" exhaust.
His truck is a '2001' 2500 4x4 H. O. with 6 speed trans. Only mods are 275 injectors K&N air filter, and 4" exhaust.