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Home >> Subaru >> 2016 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (WRX) >> High Pressure Fuel Pump >> Installation >> High-Pressure Fuel Pump
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High-Pressure Fuel Pump

  1. Install the fuel pump lifter to the high-pressure fuel pump case.
    NOTE: Apply engine oil to the side of the high-pressure fuel pump case and to the bottom surface of the fuel pump lifter.
    Fig 1: Locating Fuel Pump Lifter Of Fuel Pump Case
    G09479701Courtesy of SUBARU OF AMERICA, INC.
  2. Using TORX PLUS® bit 40IP, install the high-pressure fuel pump.
    NOTE: Use new O-rings.

    Tightening torque: 

    21 N.m (2.1 kgf-m, 15.5 ft-lb) 

    Fig 2: Installing High-Pressure Fuel Pump Using Torx Plus® Bit 40IP
    G09479700Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the connector (B) to the high-pressure fuel pump, and install the fuel delivery pipe (A) to the high-pressure fuel pump.
    CAUTION:
    • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
    • When connecting the quick connector, make sure to insert it all the way in before locking the slider.
    • When it is difficult to lock the slider, check that the connector is fully inserted.
    • After locking the slider, check again that the quick connector is securely connected.
    NOTE: Connect the quick connector as shown in the figure.
    Fig 3: Connecting Quick Connector
    G10291218Courtesy of SUBARU OF AMERICA, INC.
    Fig 4: Identifying High-Pressure Fuel Pump Connector And Fuel Delivery Pipe
    G09479699Courtesy of SUBARU OF AMERICA, INC.
  4. Temporarily tighten the high-pressure fuel delivery pipe by hand until it is seated, and tighten the flare nuts on both ends.
    CAUTION: Always use a new high-pressure fuel delivery pipe.

    Tightening torque: 

    25 N.m (2.5 kgf-m, 18.4 ft-lb) 

    Fig 5: Locating High-Pressure Fuel Delivery Pipes Flare Nuts
    G09479697Courtesy of SUBARU OF AMERICA, INC.
  5. Install the fuel pipe insulator No. 2. < Ref. to FUEL PIPE INSULATOR NO. 2 , INSTALLATION, Fuel Insulator. >
  6. Install the fuel pipe insulator No. 1. < Ref. to FUEL PIPE INSULATOR NO. 1 , INSTALLATION, Fuel Insulator. >
  7. Install the fuel pump insulator. < Ref. to FUEL PUMP INSULATOR , INSTALLATION, Fuel Insulator. >
  8. Install the intake manifold. < Ref. to INSTALLATION , Intake Manifold. >
  9. Connect the ground terminal to battery sensor. < Ref. to BATTERY , NOTE, Note. >
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