[SOLVED] Fuel Pump Relay Problems
I have a 1995 Ram 2500 8.0L V10, and just started having this problem when the weather started getting cold this year.
At first, when the temperature was getting down into the 40s, the fuel pump relay would click rapidly when I turned the ignition to ON and the check engine light would flash in sync with the relay clicking. The engine would crank just fine while this was happening, but it wouldn't start. I found that if I just move the ignition back and forth between ON and OFF a few times, the relay would stop clicking, I could hear the fuel pump run and the engine would start up and run like a champ.
Now that the weather has dipped into the teens, the fuel pump relay won't even click at all. I have tried swapping the relay with another, but it doesn't make a difference. When the temperature warms up into the 40s, the relay will start clicking rapidly again, and then I can move the ignition between ON and OFF until the fuel pump starts working and start the truck.
If the temperature gets above 50, the truck starts without a problem. In all of these cases, once the truck is started it runs great. No power loss, no sputtering.
Does anybody have any ideas what could be going on here? I'm at a loss. It doesn't seem like it's the fuel pump, since the truck runs fine after it finally starts. I've already swapped out the relay and that's not it. Could there be a wiring problem? Bad ground? How do I go about testing the wiring?
I appreciate any advice!
Last edited by haZZard; 01-05-2011 at 11:33 AM.