on a 1996 Dodge 1500 Ram Van with a 3.9 v6 is 7.9 volts sufficient for the fuel pump?

 

Absolutely not. You need 12v-14v for proper operation.

 

what would be the reason I am not getting 12 volts to the connector @ the fuel pump. I installed a better battery showing 13 volts @ fuel pump connector volts increased to 8.2 from 7.9

 

The wire to the fuel pump is very long, and has multiple connections. Mine ran from the firewall, under the drivers seat, up the b piller, along the roof, across the back, down below the brake light, forward along the frame rail, and across and up to the gas tank.

And that is only have the circuit. The longer the wire and the higher the current demand, the higher the voltage drop. Clean ALL your grounds as well.

Anywhere along that length of wire, it could be degraded, or a poor connection.

I rerouted my fuel pump wire rather than attempt to inspect the full length.

 

Thanks for the info Landyacht318. I just purchased a new fuel pump for my 1996 Dodge 1500 ram van have not installed it yet, still unplugging connectors and finding them clean with no corrosion, any suggestions as to how i can increase my voltage to fuel pump connector can't seem to find a ground any closer than near the battery. I read about what you did with your pump with the wire running direct can that in any way harm your pump with a constant direct connect?

 

I did not run a new wire from the ASD relay or battery to the fuel pump. Where the wire rose to the top rail behind the B pillar, I cut it and spliced it there. I then ran a much shorter wire to the fuel pump. The fuel pump must be switched by the ASD relay. Once I removed mine (1989 b250) from the firewall and left it upside down. Rainwater collected in it, and the pump was running for hours on end with the engine off/key off.

Due to the amount of roof gutter rust, and the way the original converters had screwed the fiberglass roof down in that area, I suspected the wires up there were shorting out, so I bypassed the ones for the fuel pump..

I did all this when I was unknowingly chasing down a bad engine computer.

Rerouting my wire did not solve those issues.

You should add another ground wire from the engine to the frame, if one does not already exist. Perhaps one from the battery to the frame as well. Redundant, and overkill, unless one fails.