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I have a vintage 2001 24 valve 3500 ram with a 5 speed manual trans. When the temps outside get below 40*F the truck is hard to start. The colder it is the worse it gets. However, if the truck has been plugged in over night, it will start fine. The other evening the truck was cold (about 45*F) and had not been plugged in, so I used my wifes hair dryer in the air box to supply hot air (it worked previously), it tried to, but no start and the batteries ran down trying. So I tried to pull start it. As soon as I let off the clutch in 3rd gear it started! I have tried new batteries and my fuel pressure is 15 psi at idle and 10-13 psi at WOT with a FASS DDRP lift pump. I have tested the fuel and air heaters and they check out fine. I had the codes scanned at Autozone and nothing showed up. I have checked for fuel leaks and cannot find any. The battery voltage will drop from 12.67 to 10.56 while cranking warm or cold. The wierd thing is this only happens when its cold. After the truck starts it runs great and will start fine until the engine gets cold again. It can sit for days in warm weather and will start fine. I would keep it plugged in, but that is not feasible in most places I am parked. Does anyone have any suggestions?
