Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Mechanical Fuel Pressure

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Fuel Pressure

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                                            FUEL PRESSURE

7. Fuel Pressure                                         Fuel pressure
                                                           Standard: 284 -- 314 kPa (2.9 -- 3.2 kg/cm2,
A: INSPECTION                                              41 -- 46 psi)
Before removing the fuel pressure gauge, lower
the fuel pressure.
If out of specification, check or replace the pressure
regulator and pressure regulator vacuum hose.
1) Lower the fuel pressure. 
2) Open the fuel filler flap lid, and then remove the                                            ME-00198
fuel filler cap.                                         7) After connecting the pressure regulator vacuum
3) Disconnect the fuel delivery hoses from fuel fil-     hose, measure the fuel pressure.
ter, and then connect the fuel pressure gauge.
                                                         Fuel pressure
                                                           Standard: 206 -- 235 kPa (2.1 -- 2.4 kg/cm2,
                                                           30 -- 34 psi)


4) Connect the connector of fuel pump relay.

                                                         The fuel pressure gauge registers 10 to 20 kPa (0.1
                                                         to 0.2 kg/cm2, 1 to 3 psi) higher than standard val-
                                                         ues during high-altitude operations.


5) Start the engine.
6) Measure the fuel pressure while disconnecting
the pressure regulator vacuum hose from intake


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