Fuel Pump: Testing and Inspection

Fuel Pump Relay:

If reduction of fuel supply is suspected, perform checking as follows.

Preparation:
^ Make sure that there is fuel in the tank.
^ 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.

1. Receive the hose from fuel feed pipe with a clean container, and check for fuel pump flow rate.
2. Connect the pump relay terminals with a jumper wire as shown in the image and start the fuel pump to measure delivery.

WARNING: Never generate sparks when connecting a jumper wire.

Delivery should be 0.38 liters during 15 seconds.
If the measure value is out of standard, conduct the pressure test.

For the pressure test to the fuel system refer to Fuel Pressure.