2001 Porsche Boxster Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Checking fuel pressure: Checking

  1. Undo covering cap on test connection of fuel collection pipe and remove.
  2. Connect pressure gauge (special tool P 378a) with connecting line (special tool 9559) and connect to test connection.
    Fig 1: Connecting Pressure Gauge (Special Tool P 378A) With Connect Line
    G03138933Courtesy of PORSCHE OF NORTH AMERICA, INC.
  3. Actuating fuel pump with Porsche System Tester 2: The fuel pump can be actuated with the Porsche System Tester 2 or by bridging the fuel-pump relay. Via fuel-pump relay without Tester: Disconnect fuel-pump relay from the central electrical board and bridge contacts 30 and 87 (identified as 3 and 5 on the central electrical board) with a fused shop-made cable. See Fig 2 . The fuel pump must now operate or deliver fuel.
    Fig 2: Bridging The Fuel-Pump Relay To Activate Fuel Pump
    G03138934Courtesy 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 only once.
  • Tightening torque of new brass closure cap 2.5 +/- 0.5 Nm (2.0 +/-0.5 ftlb.).
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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.