Check Volume Supply Of Fuel Pump

Precondition:  Fuel filter and electrical supply OK.

1. Relieve pressure in fuel tank by opening tank cap.
2. Connect Porsche System Tester 2.
3. Remove complete air cleaner system.
4. Detach fuel return line from the engine compartment, taking care to hold it fast  . Collect residual fuel.
   Fig 1: Detaching Fuel Return Line

   Courtesy of PORSCHE OF NORTH AMERICA, INC.
5. Connect fuel hose (shop-made, approx. 1.5 m long) to the fitting and hold in a measure container.
   Fig 2: Connecting Shop-Made Fuel Hose

   Courtesy of PORSCHE OF NORTH AMERICA, INC.
6. Actuate fuel pump with the Porsche System Tester 2 and allow fuel to flow into the measuring container for 30 seconds.

   Quantity supplied must be at least 850 cm ³  /30 s  , i.e. after 30 seconds at least 850 cm³ of fuel must be in the measuring container.

   NOTE: It is essential to observe safety regulations for handling fuel.