Originally Posted by HAILERS
When the plug is connected to the pump, and the pump is dragging the voltage down to 6vdc, I'd take the meter at THAT time, and go to the battery and make sure the voltage at the battery is still around 12v and not down to the same 6v your seeing at the pump plug. I'm saying check the batt voltage at the same time the pump is running.
Personally I'd just run a direct wire to the pump from the battery and have at it. If the voltage still drops to the 6 and the battery voltage is about 12v at the same time, then suspect the pump or a bad ground.
Just in case: at the fuel pump plug, its the LARGE BLUE wire that is the input on the harness side of the connector and it, the LARGE BLUE, mates with a Black/White on the pump side of the connector. Just in case you were measuring the fuel gauge wire. I doubt you were. Just in case though.
Yeah, just rewire it, either permanently or for trial purposes. End the mystery.
K, with the pump running, the battery is still at 12v.
Ran a wire outside the car from the battery and spliced it in. Re-connected the negative battery cable, instantly I could hear a big difference in the fuel pump sound. Turn the key, car fires.... revs... dies. Dang.
Notice a giant puddle under the car, smells like gas... D'oh. So, fixed that leak, tried it again....
The car runs! It has to be babysat a lot, I have to keep light pressure on the gas pedal to keep the revs up. It doesn't sound quite right though, lots of breakup, pretty lumpy. When I can get a buddy over here I'll have him check timing and for vacuum leaks, but I'm getting closer!!!
It's really weird though, if I press the pedal all the way down, the car sounds like it just shuts off completely, and it dies. If I release the pedal before the revs drop completely, the car will catch and run some more. Any ideas on what would cause that?