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

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Warning
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. 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.

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

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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 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
Fuel line pressure
420—460 kPa {4.3—4.6 kgf/cm2, 61—66 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
Fuel line hold pressure
Approx. 408 kPa {4.16 kgf/cm2, 59.1 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)].)