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 then make sure it is used.
- Wear protective gloves! Prolonged contact with fuel can cause skin irritation.
- Keep a class BE fire extinguisher close by! Be mindful of the danger of sparks caused by short circuits and when connecting and disconnecting leads in electrical circuits.
- Smoking is strictly forbidden.
- 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.
- Remove the fuel rail as instructed in steps 1-18 in method description.
- Fit a transparent hose on the nozzle. This hose should be about 40 cm long and have an inside diameter of 15 mm.
- Place the end of the hose in a receptacle/measuring flask.
- Plug in the injectors to their respective connectors.
- Start the fuel pump by connecting the multi-lead connector (part no. 83 93 886 ) between fuse 8 upper pin and fuse 19 lower pin .
- Carry out the flow capacity check using the diagnostic tool. This tool will activate the injector by supplying it with battery voltage for exactly 30 seconds.
- Check the amount of fuel in the receptacle according to the table below.
- Change any defective injectors.
- Fit the fuel rail with injectors, see FUEL RAIL WITH INJECTORS, 4-CYL. (B235E/R)
or FUEL RAIL WITH INJECTORS, 4 CYL.
.INJECTORS REFERENCE
Engine type Flow capacity Maximum permissible difference between injectors B235E/R, B205E ml/30s 176+/-10 ml 18