Checking Delivery Rate

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Attach or mount a warning sign in a clearly visible position on the vehicle.
WARNING:
Highly inflammable or explosive materials
- Danger of fire or explosion
→ Avoid contact with hot parts or sources of ignition.

→ Use suction to remove ignitable vapors.

→ Attach warning sign in a clearly visible position.

Fig 1: Example Of Warning Sign
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect the rapid-action coupling on the fuel return -1- line by pressing in the locking tab -arrow- and pulling off the line. Soak up emerging residual fuel using a clean cloth.

Fig 2: Locating Rapid-Action Coupling On Fuel Return Line
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Insert the flat connector (Original Porsche spare part with Part No. 996.106.255.00 ) with the O-ring side into the open end of the hose for the special tool connection hose 9507 and secure with a screw-type clamp.

Fig 3: Identifying Flat Connector With Connection Hose (9507)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 3.1. Fit flat connector (connection diameter: 8 mm) with hose into the coupling connection on the return line. Make sure the coupling is fitted correctly and securely (it must click into place) by pulling the line apart.
2. 3.2. An adapter line with a connection diameter of 8 mm from the Test case WE1291: K-Jetronic Tester VAG. 1318 can also be used instead of the Porsche flat connector.
  
  Fig 4: Identifying Flat Connector With Hose On Return Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Put the open end of the hose in a petrol-resistant canister. Have a stopwatch ready for the following measurement.
Switch on the Porsche PIWIS Tester 9718 , select Diagnosis and then highlight the vehicle 911 (997) .
Information
- The fuel system of the 997 Turbo, 997 GT2 and 997 GT3 has two electric fuel pumps (EKP).
- The delivery rate volume and supply pressure of these pumps must be checked individually.
- These can be activated individually in the PIWIS Tester 9718 .
  
  Fig 5: Selecting Vehicle Screen Display
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Run the individual control unit search for DME. To do this, select DME with the tracer pen and press [F12>>].

Fig 6: Activating Control Unit Search Screen Display
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Select the Drive links item and then select fuel pump relay 1 with the tracer pen.
1. 7.1. Press [F8=Start] to activate fuel pump 1 (EKP 1) for 30 seconds .
  
  Fig 7: Display - Drive Link For Fuel Pump Relay 1 Screen
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Switch off the fuel pump after 30 seconds by pressing [F8]=Stop.

Fig 8: Fuel Pump 1 Activated Screen Display
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Pour the collected fuel into a suitable measuring container and compare the actual quantity delivered with the required quantity.
- Required value for quantity of fuel delivered by fuel pump 1:
  >> in 30 seconds, at least 1.1 liters << ¹⁾
Repeat the process for fuel pump 2 (EKP 2) .
1. 10.1. Proceed as described for fuel pump 1: Activate fuel pump relay 2 using the PIWIS Tester 9718 .
  - Required value for quantity of fuel delivered by fuel pump 2:
    >> in 30 seconds, at least 1.5 liters << ¹⁾
Disconnect flat connector with hose and connect the rapid-action coupling to the fuel return line. Make sure the coupling is fitted correctly and securely (it must click into place) by pulling the line apart.
¹⁾ The specified values are minimum quantities . If the supply voltage is significantly higher than 12 volts (e.g. 13.5 volts), the fuel pumps will deliver more fuel.