Fuel Pressure: Testing and Inspection

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 To prevent this, always observe the "Fuel Line Safety Procedures".

Fuel System Pressure Drop
1. Disconnect the negative battery cable.




2. Install a fuel pressure gauge between the fuel filter and the pulsation damper.
3. Connect the negative battery cable.




4. Connect the data link connector terminals F/P and GND with a jumper wire.
5. Turn the ignition switch ON for 10 sec. to operate the fuel pump.
6. Turn the ignition switch OFF and disconnect the jumper wire.
7. Observe the fuel pressure after 5 min.

Fuel Pressure: More than 147 kPa (21 psi )

8. If not as specified, perform the following inspection.
- Fuel pump fuel pressure drop.
- Pressure regulator fuel pressure drop.
- Fuel injector fuel leakage.


Fuel Line Pressure
1. Disconnect the negative battery cable.
2. Install the fuel pressure gauge between the fuel filter and the pulsation damper.
3. Connect the negative battery cable.
4. Connect the data link connector terminals F/P and GND with a jumper wire.
5. Turn the ignition switch ON.
6. Measure the fuel line pressure.

Fuel Line Pressure: 265-313 kPa (39-45 psi)

Low pressure:
- Check fuel pump maximum pressure.
High pressure:
- Replace the pressure regulator.