Fuel Pressure Hold 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 complete the "Fuel Pressure Release Procedure".

Fuel Pressure Release

FUEL PRESSURE HOLD INSPECTION
1. Disconnect the negative battery cable.




2. Connect a fuel pressure gauge between the fuel filter (high-pressure side) and the fuel distributor.
3. Connect the negative battery cable.




4. Connect the data link connector terminals F/P and GND by using a jumper wire.
5. Turn the ignition switch to ON for approx. 10 sec. to operate the fuel pump.
6. Turn oft the ignition switch. Wait for 5 min., and measure the fuel pressure.

Specification: More than 150 kPa (21 psi)

7. Disconnect the jumper wire.




8. If the pressure is lower than specified, measure the fuel pressure while pinching the return hose.
- If the fuel pressure holds, replace the pressure regulator.
- If the fuel pressure dose not hold, check the fuel pump hold pressure.
If the fuel pump hold pressure is normal, check for fuel leaks from fuel line and fuel injectors.