Electric Fuel Pump

Parent topic: Engine Fuel System

Operation

The electric fuel pump is mounted in the engine compartment. This pump is designed to push fuel rather than pull fuel.

Make sure the GND wire completes a good ground with the battery. Check the voltage at the FP wire in the harness. The pump will not operate at less than 9 Vdc. The pump is self priming.

Maintenance

The fuel pump filter should be cleaned whenever the oil is changed. The filter and gasket are replaceable but the pump cannot be repaired. It must be replaced if it is defective.

Disassembly

  1. Unscrew and remove the fuel filter bowl.

  2. Remove the fuel filter.

  3. Wash the fuel filter in cleaning solvent and blow out the dirt and cleaning solvent with compressed air.

  4. Clean the fuel filter bowl.

  5. Check the fuel filter bowl gasket and replace if necessary.

1. Pump Housing 3. Fuel Filter Bowl
2. Fuel Filter 4. Fuel Filter Bowl Gasket

Assembly

  1. Install the fuel filter up into the pump housing.

  2. Place the fuel filter bowl gasket in place on the bowl.

  3. Install the bowl onto the pump housing and hand tighten, or torque to 100 in-lbs (11.3 Nm).

If the pump does not operate, check for:

  • A good ground on the black wire pin of the pump harness.

  • More than 9 Vdc on the red wire pin of the pump harness.

  • Clean and tighten the electrical connections.

  • The pump voltage and polarity must be the same as the unit system.

If the pump operates but does not deliver fuel, check for:

  • Air leaks in the fuel lines or connections.

  • Kinks or other restrictions in the fuel lines.

  • A leaking or distorted fuel bowl gasket.

  • A clogged or dirty filter.