04 3.9 fuel delivery problem
The wife's '04 3.9 v6 sits inside all winter. Started, ran 3, 4 minutes and died. Changed fuel filter as last year midseason it did the same thing and filter was pretty dirty. Started again and it ran 3, 4 minutes and died again. Now won't hit a lick.
Seven wires disappearing above the fuel tank, two large (brn/pnk and red/blk) and 5 small. Logic says the two large are the motor wires and when the key is on, there is a constant 12.75 volts there. Plugged in, a short whine can be heard for a split second, but the pump moves no fuel. I've disconnected the fuel filter and connected a clear hose on the tank outlet (pump discharge) and placed it in a bucket. Nothing.
This has a pressure transducer in the fuel rail and is equipped with a FPDM (fuel pump driver module) so I'm figuring with the lack of pressure in the fuel rail with the filter is removed is the reason I have a full 12 volts there wanting the pump to run at full speed to build the pressure.
If it weren't such a pain to drop the tank, it'd be down already but I want to make sure the pump is bad and its not something else, because I am just guessing about the wires the 12 volts is on. Anyone shed any light on the subject ??? Apologizing for the extreme length....and thanking you in advance.