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Checking Injector Flow Capacity

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 vapor 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.
IMPORTANT: Scrupulous cleanliness is of the utmost importance when working on the fuel rail and injectors. Thoroughly clean the injectors, fuel rail and intake manifold and blow dry with compressed air.
  1. Remove the fuel rail as described under FUEL RAIL WITH INJECTORS, 4-CYL .
    Fig 1: Illustration For Steps 2, 4 And 6
    G03855551Courtesy of SAAB-SCANIA OF AMERICA, INC.
  2. Fit a transparent hose onto the nozzle. This hose should be about 40 cm long and have an inside diameter of 15 mm.
  3. Place the end of the hose in a receptacle or measuring flask.
  4. Connect each injector to its proper connector.
  5. Start the fuel pump by connecting diagnostics cable 83 93 886 LEAD FAULT DIAGNOSIS, LH-SYSTEM  to the upper pin  on fuse no. 8 and the lower pin  of fuse no. 19.
    Fig 2: Illustration For Steps 8 And 19
    G03855552Courtesy of SAAB-SCANIA OF AMERICA, INC.
  6. Perform a flow capacity test with the diagnostic tool. The diagnostic tool then activates the injector concerned with battery voltage for exactly 30 seconds.
  7. Check the quantity of fuel against the table below.
  8. Replace any defective injectors.
  9. Fit the fuel rail as described under FUEL RAIL WITH INJECTORS, 4-CYL .
    FUEL RAIL DESCRIPTION CHART

    Engine type   Flow capacity   Maximum permissible difference between injectors
    B235E ml/30s 176 +/- 7 ml 14
    B205E ml/30s 127 +/- 5 ml 10
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