Fuel Pump: Testing and Inspection

Fuel Pump Relay Energizing:

Fuel Pump Flow Test

NOTE: If reduction of fuel supply is suspected, perform the following check.

1. Make sure that there is fuel in the tank.
2. With the engine running, check the fuel feed pipe and hose from fuel tank to injector for evidence of leakage.
- Retighten, if pipe or hose connection is loose. Also, check pipes and hoses for squashing or clogging.
3. Insert the hose from fuel feed pipe into a clean container, and check for fuel pump flow rate:

CAUTION: Never generate sparks when connecting a jumper wire.

4. Connect the pump relay terminals with a jumper wire(1) as shown and start the fuel pump to measure delivery.
- In 15 seconds the pump should deliver 0.38 liters minimum
- If the measure value is out of standard, conduct the pressure test.