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Home >> Subaru >> 2000 >> Forester L F4-2.5L SOHC >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Fuel Pressure >> Testing and Inspection
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Fuel Pressure: Testing and Inspection


Fuel Pressure

A: PRECAUTIONS

WARNING:
- Place "No fire" signs near the working area.
- Disconnect ground terminal from battery.
- Be careful not to spill fuel on the floor.


B: MEASUREMENT OF FUEL PRESSURE

WARNING: Before removing fuel pressure gauge, release fuel pressure.

NOTE: It out of specification, check or replace pressure regulator and pressure regulator vacuum hose.

1. Perform fuel pressure release procedure.
2. Remove fuel filler cap.





3. Disconnect fuel delivery hoses from fuel filter, and connect fuel pressure gauge.





4. Connect connector to fuel pump relay.
5. Start the engine.





6. Measure fuel pressure while disconnecting pressure regulator vacuum hose from collector chamber.
Fuel pressure: Standard; 284 - 314 kPa (2.9 - 3.2 kg/cm2, 41 - 46 psi)





7. After connecting pressure regulator vacuum hose, measure fuel pressure.
Fuel pressure: Standard; 206 - 235 kPa (2.1 - 2.4 kg/cm2, 30 - 34 psi)

NOTE: The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0. 2 kg/cm2, 1.4 to 2.8 psi) higher than standard values during high-altitude operations.

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