Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Saab >> 2001 >> 9-3 Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pressure & Flow Tests >> Checking Residual Pressure (9-5 - 3.0L)

Checking Residual Pressure (9-5 - 3.0L)

  1. Reduce fuel pressure by removing fuel pump fuse No. 19 while the engine is idling. Turn off the ignition once the engine has stopped and replace the fuse.
  2. Remove the engine cover.
  3. Remove the valve cap. Connect the Pressure Gauge Equipment (83 93 852) and Fuel Pressure Gauge Adapter (83 94 744) to the fuel-injection rail with the "safety" on. Take off the "safety" from the adapter. See Fig 1 .
  4. Start the fuel pump with the diagnostic tool. See Fig 2 .
  5. Take a reading. It should be 43 psi (3.0 bar).
  6. Turn off the fuel pump with the diagnostic tool.
  7. Read the pressure gauge after 20 minutes. The residual pressure should be at least 33 psi (2.3 bar).
  8. Put the "safety" on the adapter and remove the pressure gauge equipment from the service nipple. Screw on the valve cap.
  9. Fit the engine cover.
Fig 1: Checking Residual Pressure (9-5 - 3.0L - 1 Of 2
G00169418Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fig 2: Checking Residual Pressure (9-5 - 3.0L - 2 Of 2
G00169419Courtesy of SAAB-SCANIA OF AMERICA, INC.
scientia non olet · About Mike's Workshop Manuals