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Fuel Pressure Sensor: Installation

  1. Replace fuel injector seal, decoupling, support disc and O-ring with new parts. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>FUEL INJECTOR>REPLACEMENT .
  2. Set the holder to the fuel injector, and install it straight to the fuel injector pipe RH.
    CAUTION:
    • Always use a new holder and fuel injector pipe RH.
    • Degrease inside of the fuel injector insertion hole of the fuel injector pipe.
    • Check the inside of the fuel injector insertion hole of the fuel injector pipe for foreign materials or damage.
    • Be careful not to allow gasoline to contact with the fuel injector seal and the inside of the mounting hole.
    • Apply liquid paraffin to the O-ring and install it.
    • Be careful not to twist the O-ring.
    • To prevent damage to the O-ring, insert the part straight along the fuel injector insertion axis without tilting it and avoid removing and inserting the part again.
    • To prevent the tip of the fuel injector from bending, do not apply force to the fuel injector tip.
    • Check that the tip of the fuel injector has no bend or damage.
    • Make sure there is no gap between the fuel injector pipe and the fuel injector holder.
    • Make sure there is no gap between the fuel injector and the fuel injector holder.
    NOTE: Align the protrusion of the fuel injector with the fuel injector pipe RH hole.
    G13198227Courtesy of SUBARU OF AMERICA, INC.
    G13198249Courtesy of SUBARU OF AMERICA, INC.
  3. Insert the fuel injector pipe RH and fuel injector as a single unit into the cylinder head, and align their positions. Then, evenly press the sections (A) and (B).
    CAUTION:
    • When installing, apply liquid paraffin to the fuel injector seal.
    • In order to prevent damaging the O-ring, do not install the fuel injector pipe and fuel injector by tilting them toward the cylinder head.
    G13198250Courtesy 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)

  5. Connect the connector (A) to fuel injector #1.
    G13198251Courtesy 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.
    • The sensor should be installed perpendicularly to the fuel pressure sensor's threaded hole of the fuel injector pipe RH, and tightened to the specified torque.
    • 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)

    G13198252Courtesy of SUBARU OF AMERICA, INC.
  8. Connect connector to the fuel pressure sensor.
    G13198253Courtesy of SUBARU OF AMERICA, INC.
  9. Install the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
  10. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
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