Forum Discussion

desertslim's avatar
desertslim
Explorer
Aug 07, 2016

No Power To Fuel Pump.

I am puzzled-- Recently had the electric fuel pump replaced ( in the tank type). Drove it home, no problems. Parked in the yard and three weeks later went to start it and it would no fire. I tried starter fluid and it would fire off ok. Checked for fuel at the throttle body inlet, none. Disconnected the connector for the fuel pump at the tank , checked voltage at the three pins. The center one read 8.0 volts. o,o volts on the other two. Had my helper crank the engine while checked the voltage. Same as above. I checked all of the fuses. all ok. This is a 1992 Bounder. All suggestions will be APPRECIATED. Thanks. Jim C
Class A

32 Replies

Show More
  • enblethen's avatar
    enblethen
    Nomad
    Aug 07, 2016
    Fuel pump relay supplies power to charge the system.
    After that happens the oil pressure sending unit provides power to the pump.
    Fuel pump relay is normally mounted under the dog house on the driver's side.
    The oil pressure sending unit is located along the bottom of the block near the power steering pump.
    I would get a fuel pump relay.
    However, if the rig fires with starting fluid and then shuts down, I would say the oil pressure sending is the culprit.
    The fuel pump relay stays energized for a few seconds powered off power circuit to oil pressure sending unit.
  • ScottG's avatar
    ScottG
    Nomad
    Aug 07, 2016
    Fuel pump relay should have been replaced at the same time as pump. If not then replace it.

About Motorhome Group

38,763 PostsLatest Activity: Dec 05, 2025