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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 5 (FUEL INJECTION SYSTEM (HEV))FUEL PRESSURE SENSORINSTALLATION
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

Fuel Pressure Sensor: Installation

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Installation
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
  1. Prepare for installing the fuel injector using the following new parts. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>FUEL INJECTOR>REPLACEMENT .
    • Fuel injector seal
    • Slider washer
    • Back-up ring
    • O-ring seal
    • Stopper ring
  2. Install the fuel injector holder to the fuel injector assembly.
    CAUTION:

    Always use a new fuel injector holder. 

    G13230840Courtesy of SUBARU OF AMERICA, INC.
  3. Align the protrusion of the fuel injector holder to the anti-rotation slot of the fuel injector pipe RH, and install the fuel injector straight to the fuel injector pipe RH.
    CAUTION:
    • Always use a new fuel injector pipe RH. 
    • 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 seal and install it. 
    • In order to prevent damaging the O-ring seal, do not install the fuel injector to the fuel injector pipe by tilting or twisting it. 
    • 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. 
    G13934162Courtesy of SUBARU OF AMERICA, INC.
  4. 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 seal, do not install the fuel injector pipe and fuel injector by tilting them toward the cylinder head. 
    G13230868Courtesy of SUBARU OF AMERICA, INC.
  5. Tighten the bolts which hold the fuel injector pipe RH.

    Tightening torque: 

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

    G13230869Courtesy 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)

    G13230870Courtesy of SUBARU OF AMERICA, INC.
  8. Connect the connector (A) to the fuel pressure sensor, and connect the connector (B) to the fuel injector.
    G13230871Courtesy of SUBARU OF AMERICA, INC.
  9. Install the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
  10. Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO (EXCEPT FOR HEV))>AIR INTAKE BOOT>INSTALLATION .
  11. Connect the battery ground terminal. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
RENDER: 1.0x

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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.