Checking injector flow capacity
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Checking injector flow capacity
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Warning
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The check involves partial dismantling of the car's fuel system. The following points should therefore be observed in connection with the work:
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Work only in a well-ventilated area! If approved equipment for the extraction of fuel vapour is available then make sure it is used.
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Wear suitable gloves! Prolonged contact with fuel can cause skin irritation.
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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.
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Smoking is strictly forbidden.
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Important
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Great cleanliness must be observed when working on the fuel rail and injectors. Wash valves, fuel rail and intake manifold and clean them with compressed air.
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1.
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Remove the fuel rail, see
.
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2.
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Fit the fuel connections to the fuel rail.
Fit a transparent hose on the nozzle. This hose should be about 40 cm long and have an inside diameter of 15 mm.
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3.
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Direct the hose into a receptacle/measuring glass.
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4.
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Plug in the connectors to their respective injectors.
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5.
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Start the fuel pump by connecting cable no. 83 93 886 between fuel pump fuse no. 32,
bottom pin
, and luggage compartment lighting fuse no. 4,
top pin
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6.
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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.
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7.
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The amount of fuel after
30
seconds should be:
B235R: 176 +/- 10 ml
B205R: 176 +/- 10 ml
B205L: 144 +/- 7 ml
The difference between the injectors should not exceed:
B235R: 20 ml
B205R: 20 ml
B205E: 12 ml
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8.
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Change any defective injectors.
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9.
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Detach the fuel connections from the fuel rail and fit the fuel rail as described in
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