FixVault

Fuel Pressure: Inspection

CAUTION:
  • Before removing the fuel pressure gauge, release the fuel pressure.
  • Be careful not to spill fuel.
  • Catch the fuel from hoses using a container or cloth.
  1. Remove the collector cover.
  2. Release the fuel pressure. < Refer to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel. >
  3. Open the fuel filler lid and remove the fuel filler cap.
  4. Disconnect the fuel delivery hose and connect the fuel pressure gauge.
    1. Disconnect the fuel delivery hose using the ST.

      ST 42099AE000 QUICK CONNECTOR RELEASE

      Fig 1: Disconnecting Fuel Delivery Hose Using Special Tool
      G07924523Courtesy of SUBARU OF AMERICA, INC.
    2. Connect the fuel pressure gauge with ST1 and ST2.
    NOTE:

    ST1 is a SUBARU genuine part.


    ST1 42075AG690 FUEL HOSE
    ST2 18471AA000 FUEL PIPE ADAPTER
    Fig 2: Connecting Fuel Pressure Gauge With Special Tools
    G07924664Courtesy of SUBARU OF AMERICA, INC.
  5. Start the engine.
  6. Check the fuel pressure after warming up the engine.
    NOTE:
    • The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0.2 kgf/cm2 , 1 to 3 psi) higher than standard values during high-altitude operations.
    • Check or replace the fuel pump and fuel delivery line if the fuel pressure is out of the standard.

    Fuel pressure: 

    Standard 

    340 - 400 kPa (3.5 - 4.1 kgf/cm 2  , 49.3 - 58 psi)