SAAB WIS ONLINE

Checking the fuel pressure regulator, 4 cyl.

Checking the fuel pressure regulator, 4 cyl.

Warning

Removal of the fuel pressure regulator involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with this work:

• Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapours is available, be sure to use it.

• Wear suitable gloves! Prolonged contact with fuel can cause skin irritation or dermatitis.

• Keep a class BE fire extinguisher near at hand! Be mindful of the danger of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.

• No smoking anywhere in the vicinity.

• Wear protective goggles.




1. Unscrew the valve cap. Connect the pressure gauge equipment, part no. 83 93 852, and the adapter, part no. 83 94 744. Connect the adapter to the fuel rail with the "safety catch" on. Release the "safety catch".


2. Detach the vacuum hose from the pressure regulator and connect the pressure/vacuum pump, part no. 30 14 883, and the boost pressure gauge, part no. 83 93 514.


3. Start the fuel pump using the diagnostics tool.


4. Check the reading at barometric pressure. The reading should be 3 bar (43 psi).


5. Increase the negative pressure in the pressure regulator by means of the pressure vacuum pump. System pressure should drop by the same amount as indicated on the pressure gauge.

System pressure

bar (psi)

3.0 (43)



6. Pump up the pressure in the pressure regulator with the vacuum pump. The system pressure should now increase with the same amount as the reading on the pressure gauge.


7. Switch off the fuel pump using the diagnostics tool.

8. Put on the "safety catch" on the adapter and remove the pressure gauge equipment from the service nipple. Screw on the valve cap.