2024 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE

High-Pressure Fuel Pump

  1. Install the 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.
      • After installing the fuel pump lifter, rotate the crankshaft in order to set the fuel pump lifter comes to the lowest position.
        G13198255Courtesy of SUBARU OF AMERICA, INC.
    2. Set new O-rings.
    3. Using TORX PLUS® 40IP, temporarily tighten the mounting bolts alternately to install the high-pressure fuel pump.
    4. Tighten the bolts which hold the high-pressure fuel pump.

      Tightening torque: 

      21 N.m (2.1 kgf-m, 15.5 ft-lb)

      G14600986Courtesy of SUBARU OF AMERICA, INC.
  2. Install the high-pressure fuel delivery pipe. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE .
  3. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>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.