2019 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Fuel Pressure Sensor: Installation

  1. Replace the injector seal, backup ring and O-ring with a new part. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>FUEL INJECTOR>REPLACEMENT .
  2. Set the spacer, holder, rubber cover and snap ring to the fuel injector, and install it to the fuel injector pipe RH.
    CAUTION: Always use a new spacer, holder, rubber cover and snap ring.
    G13258435Courtesy of SUBARU OF AMERICA, INC.
  3. Set the fuel injector on the fuel injector pipe RH.
    CAUTION:
    • • on the fuel injector pipe RH must be aligned with on the rubber cover.
    • Parting line (a) of the rubber cover must be straight.
      G12444121Courtesy of SUBARU OF AMERICA, INC.
    • The end surface of the fuel injector pipe RH must fit inside the rubber cover.
    • There must be no gap between the snap ring and rubber cover.
    G12444122Courtesy of SUBARU OF AMERICA, INC.
  4. Install the fuel injector pipe RH and fuel injector as a single unit to the cylinder head.
  5. Tighten the fuel injector pipe RH.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb)

    G09479694Courtesy of SUBARU OF AMERICA, INC.
  6. 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.
  7. 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)

    G09479695Courtesy of SUBARU OF AMERICA, INC.
  8. Install the high-pressure fuel delivery pipe assembly. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSY .
  9. Connect the ground terminal to battery sensor. Refer to NOTE>NOTE>BATTERY .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.