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Fuel Pressure: Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Remove the collector cover.
    1. Carefully pull up the rear of collector cover at two positions (A).
    2. Carefully pull up the front of collector cover at two positions (B) while moving it forward.
      Fig 1: Removing Collector Cover
      G11585612Courtesy of SUBARU OF AMERICA, INC.
    3. Release the fuel pressure. Ref. to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel.
    4. Open the fuel filler lid and remove the fuel filler cap.
    NOTE: This operation is required to release the inner pressure of the fuel tank.
  2. Disconnect the fuel delivery tube from the fuel delivery pipe, and connect the fuel pressure gauge.
    CAUTION:
    • Be careful not to spill fuel.
    • Catch the fuel from the tubes using a container or cloth.
    1. Remove the clip (A) securing the fuel delivery tube.
    2. Attach ST to the fuel pipe assembly and push ST in the direction of arrow mark to disconnect the quick connector of the fuel delivery tube (B).

      ST 42099AE000 QUICK CONNECTOR RELEASE

      Fig 2: Attaching ST To Fuel Pipe Assembly
      G10263651Courtesy of SUBARU OF AMERICA, INC.
    3. Connect the fuel pressure gauge with ST1 and ST2.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • Make sure that the quick connector is securely connected.
    NOTE: ST1 is a SUBARU genuine part.
    ST1 42075AG690 FUEL HOSE
    ST2 18471AA000 FUEL PIPE ADAPTER
    Fig 3: Connecting Fuel Pressure Gauge With ST1 And ST2
    G11585983Courtesy of SUBARU OF AMERICA, INC.
  3. Start the engine.
  4. Check the fuel pressure after warming up the engine.
    NOTE:
    • The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0.2 kg/cm2 , 1 to 3 psi) higher than standard values during high-altitude operations.
    • Check or replace the fuel pump and fuel delivery line if the fuel pressure is out of the standard.

    Fuel pressure: 

    Standard 

    340 - 400 kPa (3.5 - 4.1 kg/cm 2  , 49.3 - 58 psi) 

  5. After inspection, install the related parts in the reverse order of removal.
    CAUTION:
    • Before removing the fuel pressure gauge, release the fuel pressure.
    • Be careful not to spill fuel.
    • Catch the fuel from hoses and tubes using a container or cloth.
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • Make sure that the quick connector is securely connected.
    NOTE: When disconnecting the ST1 or fuel delivery tube, install the ST3 to the fuel pipe assembly or to ST2, and press the ST3 in the direction of arrow to disconnect the ST1 or the quick connector of the fuel delivery tube.
    ST1 42075AG690 FUEL HOSE
    ST2 18471AA000 FUEL PIPE ADAPTER
    ST3 42099AE000 QUICK CONNECTOR RELEASE
    Fig 4: Installing ST3 To Fuel Pipe Assembly
    G10263900Courtesy of SUBARU OF AMERICA, INC.
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