FUEL LINE PRESSURE INSPECTION [AJ (3.0L Duratec)]

Warning

• Fuel line spills and leakage from the pressurized fuel system are dangerous. To prevent this, complete the following inspection with the engine stopped.

1. Perform the 'Fuel Line Safety Procedure' referring to the BEFORE SERVICE PRECAUTION. (See BEFORE SERVICE PRECAUTION [AJ (3.0L Duratec)].)

2. Disconnect the negative battery cable.

3. Remove the air cleaner. (See AIR CLEANER REMOVAL/INSTALLATION [AJ (3.0L Duratec)].)

4. Disconnect the quick release connector of the engine compartment side. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [AJ (3.0L Duratec)].)

5. Turn the lever of the SST parallel to the hose as shown in the figure.

6. Insert the SST quick release connector into the fuel pipe until a click is heard.

7. Verify that the installation is secured by pulling the quick release connector.

8. Connect the negative battery cable.

9. Start the engine.

10. Inspect the fuel pressure and verify that the pulse is within the specification.

•  If it is not within the specification, inspect for the following and repair or replace any malfunctioning parts.

Fuel pressure is lower than the specification

- Fuel pump

- Fuel line leakage

- Fuel line clogging

Fuel pressure is higher than the specification

- Replace the pressure regulator

If the pulse is not within the specification

- Replace the pulsation damper

fuel line pressure

0.42-0.46 MPa {4.3 kgf/cm2, 61 psi}

11. Turn the ignition switch to the LOCK position and measure the fuel pressure after 5 min.

•  If it is not within the specification, inspect for the following and repair or replace any malfunctioning parts.

Zero or low

- Fuel pump

- Fuel line leakage

- Fuel line clogging

Hold pressure

0.408 MPa {4.16 kgf/cm2, 59.2 psi} or more

12. Perform the 'Fuel Line Safety Procedure' referring to the BEFORE SERVICE PRECAUTION. (See BEFORE SERVICE PRECAUTION [AJ (3.0L Duratec)].)

13. Disconnect the SST.

14. Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [AJ (3.0L Duratec)].)

15. Inspect all parts by performing the AFTER SERVICE PRECAUTION. (See AFTER SERVICE PRECAUTION [AJ (3.0L Duratec)].)