Checking Fuel Pressure - Engine Stopped

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.

WARNING: Risk of damage to skin and eyes from toxic and caustic effects of fuel.

→ In case of contact with skin or eyes wash immediately with plenty of warm water and acid-free soap.

→ Consult a doctor as soon as possible.

→ Wear personal protective gear when working with fuel.

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.

Open the retaining clip for the fuel lines -1- on the underbody and unclip the supply line.
1. 1.1. To do this, open the clip -arrow- using a small screwdriver.
  
  Fig 1: Opening Retaining Clip On Fuel Lines
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Open the rapid-action coupling on the fuel pressure line -1- .
1. 2.1. Wrap a cloth around the connection point (to prevent splashes), press the two locking lugs and carefully pull the line apart.
  
  Fig 2: Identifying Coupling On Fuel Pressure Line
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Connect special tool test pressure gauge with lines from K-Jetronic Tester VAG. 1318 WE 1291 to the fuel lines.
1. 3.1. Engage pressure gauge on the transmission bracket using the chain.
2. 3.2. Insert connection lines into the relevant couplings.
  1. Pressure gauge
  2. Connection line no. 17 (short) from VAG 1318 and P 378 C fitted on line to the engine
  3. Connection line no. 17 (long) from VAG 1318 fitted on line to the fuel tank
    
    Fig 3: Inserting Connection Lines Into Relevant Couplings
    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 3.3. Alternatively, the test can be performed using the pressure gauge 378a .
  To do this, connect line no. 17 to the plug-in coupling for the fuel tank.
  
  Fig 4: Identifying Test Pressure Gauge
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
PIWIS Tester II 9818 must be connected to the adapter line at the input socket in the vehicle and ignition must be switched on.
1. 4.1. Switch off all loads, such as radio, air conditioning, etc. Switch on the Tester and select the relevant vehicle.
Select the menu DME , Maintenance/repairs and press [F12] to continue.
Select the menu Drain tank and press [F12] to continue.
The following message is displayed.

Fig 5: Drain Tank Message Screen Display
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Read off the pressure shown on the pressure gauge.
→ Pressure: 0.5 bar+/-0.3 bar
Press [F8] to stop the Drain tank routine.
Switch off the ignition and remove PIWIS Tester adapter lead in the vehicle.
Holding pressure test:
Holding pressure after 20 minutes.

→ Pressure: 4.0 bar+0.5 bar
Disconnect test connections and remove test pressure gauge.
Wrap a cloth around the connection point (to prevent splashes), press the two locking lugs and carefully pull the line apart.
1. 12.1. Connect plug-in coupling for fuel lines.
2. 12.2. The coupling must lock with an audible click. Pull to check that the connection is secure.
Information
- When the work is complete, check that all aids and foreign objects (e.g. cloths, tools) are removed from the engine compartment.
Make sure there are no tools, foreign objects or aids left in the work area.