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FUEL LINE PRESSURE INSPECTION [L3 Turbo]

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Low Pressure Line (From the Fuel Tank to the High Pressure Fuel Pump)

Warning

•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death. Fuel can also irritate skin and eyes. To prevent this, always complete the “BEFORE SERVICE PRECAUTION”. (See BEFORE SERVICE PRECAUTION [L3 Turbo].)

Caution

•  Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting using cloth or soft brush, and make sure that it is free of foreign material.

1.  Complete the “BEFORE SERVICE PRECAUTION”.

(See BEFORE SERVICE PRECAUTION [L3 Turbo])

2.  Disconnect the vacuum hose from the intake manifold that connecting to the brake booster.

3.  Disconnect the negative battery cable.

Caution

•  The quick release connector may be damaged if the tab is turned too far. Do not turn the tab over the stopper.

4.  Disconnect the quick release connector from the fuel tank. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [L3 Turbo].)

5.  Push the SST quick release connector into the fuel pipe and plastic fuel hose into the SST until a click is heard.

6.  Turn the lever parallel to the hose of the SST as shown.

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7.  Connect the vacuum hose to the intake manifold that connecting to the brake booster.

8.  Connect the negative battery cable.

9.  Verify the vehicle"s MTX is in neutral position.

10.  Start the engine and let it idle. Measure the fuel line pressure.

•  If not as specified, inspect the following:

Zero or low

―  FP circuit

―  FP

―  Fuel line (clogged)

―  Fuel leakage inside pressure regulator

High

―  Pressure regulator for high pressure cause

11.  Turn the ignition switch to the LOCK position.

12.  Measure the fuel hold pressure after 5 min.

•  If not as specified, inspect the following:

―  FP hold pressure

―  Fuel injector for leakage

―  Fuel line for improper routing, kinks or leakage

13.  Complete the “BEFORE SERVICE PRECAUTION”.

(See BEFORE SERVICE PRECAUTION [L3 Turbo])

14.  Disconnect the vacuum hose from the intake manifold that connecting to the brake booster.

15.  Disconnect the SST.

16.  Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [L3 Turbo].)

High Pressure Line (From the High Pressure Fuel Pump to the Fuel Injector)

1.  Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [L3 Turbo].)(See FUEL PRESSURE SENSOR REMOVAL/INSTALLATION [L3 Turbo].)

2.  Inspect the high pressure fuel pump. (See HIGH PRESSURE FUEL PUMP INSPECTION [L3 Turbo].)