Checking Fuel Injector

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.

Clamp the test device -1- on the workbench or in a vice.

Fig 1: Checking Fuel Injector
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check that the container is filled with test fluid.
Function test (leak test):
Perform leak test on the test device.
1. 3.1. Fit test adapter.
2. 3.2. Bleed the system using the pressure piston -1- (no air bubbles in the transparent hose).
  Black lever is open!
3. 3.3. Close the black lever by turning it clockwise!
4. 3.4. Use the pressure piston to build up pressure of 100 bar -arrow- .
5. 3.5. When the pointer on the pressure gauge stops moving, the pressure in the closed system must be retained.
  Monitor the pressure gauge for one minute!
6. 3.6. If the pressure drops, check all connections for leaks and correct them.
  
  Fig 2: Locating Pressure Gauge
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove the test adapter and screw it to the base plate.
Insert fuel injector into the test device.
1. 5.1. Insert fuel injector -1- into the mounting plate.
2. 5.2. Fit a suitable upper part (O-ring or screw-on variant) -2- for the injector.
3. 5.3. Secure the tensioning plate -3- with the winged nuts.
  
  Fig 3: Inserting Fuel Injector
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Connect the relevant cable plug -1- to the fuel injector -2- .

Fig 4: Connecting Cable Plug On Fuel Injector
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Connect sender and control mechanism.
1. 7.1. Connect connecting cable -1- for the fuel injector to the sender -2- .
2. 7.2. Connect signal cable of the control mechanism -3- to the sender -arrow- .
3. 7.3. Connect the control mechanism's power supply connecting cable to the 12-volt battery -4- .
  
  Fig 5: Connecting Sender And Control Mechanism
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Cleaning injectors:

The injectors are cleaned in continuous mode!
Visually inspect the injector tip for soiling.
Clean the injector tip in an ultrasound bath first if possible.
Fit the fuel injector in a holder and position it on the container.
Set Continuous mode on the control mechanism using the arrow keys and press "Enter" to start.
Press and hold the "Enter" key for about 3 seconds to get the continuous signal.

Fig 6: Identifying Continuous Signal
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Actuate the pressure piston several times to set a pressure of around 150 bar.
1. 12.1. Press "Enter" to stop the process.
2. 12.2. Then check the spray pattern.
Checking spray pattern:
To check the spray pattern, set "Single shot" -1- on the control mechanism using the arrow keys.

Fig 7: Identifying Single Shot On Control Mechanism
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Preparatory steps for checking the spray pattern:
1. 14.1. Close the black lever by turning it clockwise!
2. 14.2. Set the pressure to 100 bar!
3. 14.3. Insert fuel injector holder -1- into the retaining ring -2- .
4. 14.4. Place clean paper (with a quality of at least 80g/cm, about DIN A4 size) -3- under the test device.
  
  Fig 8: Checking Spray Pattern Of Fuel Injector
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check the spray pattern of the fuel injector.
1. 15.1. Press "Enter" on the control mechanism to confirm.
2. 15.2. Example of multi-port injector:
  
  Fig 9: Checking Spray Pattern
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 15.3. Example of single-port injector:
  
  Fig 10: Example Of Single-Port Injector Spray Pattern
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
If the spray pattern differs from the required pattern even after cleaning the injector one or more times, replace the fuel injector.
Prerequisite: The fuel injectors will only work perfectly if fuel of the prescribed quality is used!