Checking residual pressure (B235R, B205L/R)

WARNING: This page is about a different car, the 2003 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: This check involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with the work:

Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapors 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 close at hand! Beware of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.
No smoking anywhere in the vicinity.

Reduce the fuel pressure by removing the fuel pump fuse no. 32 while the engine is idling. Turn off the ignition once the engine has stopped.

Fig 1: Illustration For Step 1
Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fit the fuel pump fuse no. 32.
Remove the engine cover.
Unscrew the valve cap from the fuel rail's service nipple. Connect 83 93 852 PRESSURE GAUGE EQUIPMENT, FUEL AND OIL PRESSURE and 83 94 744 Adapter, fuel pressure gauge . Connect the adapter "safety on".

Fig 2: Illustration For Steps 3-4
Courtesy of SAAB-SCANIA OF AMERICA, INC.

"Safety off" the adapter.
Run the pump with the diagnostic tool until the pressure gauge no longer rises.
The residual pressure after 20 minutes should be at least 2.3 bar (33 psi) .
Take a pressure reading.
"Safety on" the adapter and remove the pressure gauge equipment from the fuel rail service nipple. Screw on the valve cap.

Fig 3: Illustration For Steps 6-7
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fit the engine cover.