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.

Release the fuel pressure. Refer to RELEASING OF FUEL PRESSURE
Open the fuel filler lid and remove the fuel filler cap.
Disconnect the fuel delivery hose and connect the fuel pressure gauge.
CAUTION:
- Be careful not to spill fuel.
- Catch the fuel from hoses using a container or cloth.
1. Attach ST to the fuel delivery pipe and push ST1 in the direction of arrow mark to disconnect the quick connector of the fuel delivery hose.
  ST 42099AE000 QUICK CONNECTOR RELEASE
  
  Fig 1: Disconnecting Quick Connector Of Fuel Delivery Hose
  Courtesy of SUBARU OF AMERICA, INC.
2. Connect the fuel pressure gauge with ST2 and ST3.
  NOTE: ST2 is a SUBARU genuine part.
  ST2 42075AG690 FUEL HOSE
  ST3 18471AA000 FUEL PIPE ADAPTER
  
  Fig 2: Connecting Fuel Pressure Gauge Using ST2 And ST3
  Courtesy of SUBARU OF AMERICA, INC.
Start the engine.
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 - 58 psi)
After inspection, install the related parts in the reverse order of removal.