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Home >> Porsche >> 2000 >> Boxster Base, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> DME 7.2 - 911 CARRERA & BOXSTER >> DTC P1133: Oxygen Sensing Adaptation, Lower Load Range, Bank 2 - Below Limit >> Diagnosis Procedure >> Check Fuel Pressure

Check Fuel Pressure

  1. Undo and remove the closure cap of the fuel collection pipe test connection (A/F 13 mm).
  2. Connect pressure gauge (special tool P 378a) to connecting line (special tool 9559) and connect to test connection.
    Fig 1: Connecting Special Tool P 378a
    G00401891Courtesy of PORSCHE OF NORTH AMERICA, INC.
  3. Actuate fuel pump, either:
    • with Porsche System Tester 2  . The fuel pump can be actuated with the Porsche System Tester 2 or by jumpering the fuel pump relay.

      or

    • via fuel pump relay without tester  . Disconnect the fuel pump relay from the central electrical system and jumper plug-in contacts 30 and 87 (identification 3 and 5 on central electrical system) with a fused shop-made cable. The fuel pump must no operate or deliver fuel.
      Fig 2: Identifying Fuel Pump Relay Terminals To Jumper
      G00401892Courtesy of PORSCHE OF NORTH AMERICA, INC.
  4. Nominal test values:
    • Stationary engine: 3.8 +/- 0.2 bar
    • Engine idling: 3.3 +/- 0.2 bar
    NOTE: The seal or sealing ring in the brass closure cap is not  exchangeable. It must therefore be used on once  .

    Tightening torque of new brass closure cap 2.5 +/- 0.5 Nm (2.0 + 0.5 ft. lbs.).

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