Fuel Pressure Testing

WARNING: Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes.

1. Disconnect the negative battery cable.

Fuel Pressure Gauge Installation:

2. Install a fuel pressure gauge between the fuel filter and the main fuel hose. (Install clamps as shown.)




4. Remove the fuel pump relay.

CAUTION: Connecting the wrong fuel pump relay socket terminals may possibly cause a malfunction. Carefully connect the specified terminals only.




5. Connect fuel pump relay socket terminal 30 and 87 by using a jumper wire.

CAUTION: Before connecting the negative battery cable be sure all fuel connections, clamps and fittings are secure. Fuel pump will operate at full pressure anytime the cable is connected to the battery. When the cable makes contact, it is sure to arc and create a danger of ignition or explosion.

6. Connect the negative battery cable to operate the fuel pump.
7. Measure the fuel line pressure.

Fuel pressure: 260-310 kPa (37-46 psi)

8. If not as specified, perform the following inspections.
- Fuel pump maximum pressure.
- Fuel line clogging and restriction.
- Fuel filter clogging and restriction.
- Pressure regulator hold pressure.