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Home >> Subaru >> 2015 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (Except STI) >> Fuel Pressure Sensor >> Installation
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Fuel Pressure Sensor: Installation

  1. Replace injector seal, retainer, and O-ring with a new part. <Ref. to REPLACEMENT , Fuel Injector.>
  2. Set the holder to the fuel injector, and install it to the fuel injector pipe RH.
    CAUTION:
    • Always use a new holder.
    • Always use a new fuel injector pipe RH.
    Fig 1: Setting Holder To Fuel Injector
    G09479692Courtesy of SUBARU OF AMERICA, INC.
  3. Install the fuel injector pipe RH and fuel injector as a single unit to the cylinder head.
    Fig 2: Installing Fuel Injector Pipe RH And Fuel Injector Single Unit To Cylinder Head
    G09479693Courtesy of SUBARU OF AMERICA, INC.
  4. Tighten the fuel injector pipe RH.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb) 

    Fig 3: Locating Fuel Injector Pipe RH Bolts
    G09479694Courtesy of SUBARU OF AMERICA, INC.
  5. Temporarily tighten the fuel pressure sensor to the fuel injector pipe RH until it cannot be turned by hand.
    CAUTION: Always use a new fuel pressure sensor.
  6. Tighten the fuel pressure sensor.
    CAUTION:
    • Be careful not to spill oil on the screw sections of the fuel pressure sensor and the fuel injector pipe RH.
    • Be careful not to let foreign matter enter into the fuel pressure sensor during installation.
    • Do not recheck the tightening torque after tightening the fuel pressure sensor with specified torque.

    Tightening torque: 

    46 N.m (4.7 kgf-m, 33.9 ft-lb) 

    Fig 4: Locating Fuel Pressure Sensor
    G09479695Courtesy of SUBARU OF AMERICA, INC.
  7. Install the high-pressure fuel delivery pipe assembly.
    CAUTION: Always use a new high-pressure fuel delivery pipe assembly.
    1. Temporarily tighten the flare nut (A) to the fuel injector pipe by hand until it is seated, and secure the high-pressure fuel delivery pipe assembly to the water pipe assembly using bolts (B).

      Tightening torque: 

      T1: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

    2. Tighten the flare nuts (A).

      Tightening torque: 

      T2: 25 N.m (2.5 kgf-m, 18.4 ft-lb) 

    Fig 5: Identifying High-Pressure Fuel Delivery Pipe Assembly Flare Nuts And Bolts
    G09479673Courtesy of SUBARU OF AMERICA, INC.
  8. Install the fuel pipe insulator No. 3. <Ref. to FUEL PIPE INSULATOR NO. 3 , INSTALLATION, Fuel Insulator.>
  9. Install the fuel pipe insulator No. 2. <Ref. to FUEL PIPE INSULATOR NO. 2 , INSTALLATION, Fuel Insulator.>
  10. Install the fuel pipe insulator No. 1. <Ref. to FUEL PIPE INSULATOR NO. 1 , INSTALLATION, Fuel Insulator.>
  11. Install the intake manifold. <Ref. to INSTALLATION , Intake Manifold.>
  12. Connect the ground terminal to battery sensor. <Ref. to BATTERY , NOTE, Note.>
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