Millenia L V6-2.5L DOHC (1997)
Fuel Pressure: Testing and Inspection
Fuel Line Pressure 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".
See: Fuel Filter/Fuel Pressure Release
FUEL LINE PRESSURE INSPECTION
1. Disconnect the negative battery cable.
2. Connect a fuel pressure gauge between the fuel filter (high pressure side) and 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 and measure the fuel pressure.
Specification: 270-310 kPa (39-45 psi)
6. Turn off the ignition switch and disconnect the jumper wire.
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If the pressure is higher than specified, check the fuel pump maximum pressure.
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If normal, check the pressure regulator or fuel return hose for clogs.
8. If the pressure is lower than specified, measure the fuel pressure while pinching the return hose.
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If the fuel pressure quickly increases, check the pressure regulator.
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If the fuel pressure gradually increases, check the fuel pump maximum pressure.
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If the pressure is normal, check for clogging between fuel pump and pressure regulator.
