Fuel rail with injectors, 4-cyl. (B235E/R)
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Fuel rail with injectors, 4-cyl. (B235E/R)
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Warning
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Removal of the fuel rail involves partial dismantling of the car's fuel system. The following points must therefore be observed in connection with this work:
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Make sure a class BE fire extinguisher is close to hand! Consider the risk of sparking, e.g. when breaking circuits, short-circuits etc.
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Absolutely No Smoking!
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Ensure that there is a good exchange of air. If approved ventilation for the extraction of fuel fumes is available, this should be used.
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Wear protective gloves! Prolonged exposure of the hands to fuel can cause irritation to the skin.
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Wear protective goggles.
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Important
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Great cleanliness must be observed when working on the fuel rail and injectors. Clean the injectors, fuel-injection rail and intake manifold. Blow clean with compressed air.
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1.
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Remove the upper engine cover.
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2.
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Remove fuse 19 with the engine running. Turn the ignition key to OFF when the engine has stopped.
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3.
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Undo the hoses for the crankcase ventilation.
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4.
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Take out the dipstick with oil filler pipe end and plug the pipe.
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5.
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Remove the cover and detach the throttle cable from the throttle spindle. Bend the throttle cable and holder to one side.
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6.
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Unplug the connectors for the injectors, ignition discharge module, absolute pressure sensor, mass air flow sensor and the turbo pressure sensor.
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7.
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Slacken the upper bolt of the wiring holder.
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8.
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Remove the lower screws.
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9.
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Lift up the wiring holder and bend it rearwards.
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10.
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Loosen the cable and bend them to one side.
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Important
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Secure each injector clip with a narrow cable tie. Make sure that it is fitted correctly before tightening. If not, the injectors could come loose from the fuel rail during the flow test.
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12.
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Clean the area round the injectors with compressed air.
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13.
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Disconnect the pressure regulator's vacuum hose.
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14.
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Remove the fuel rail's 2 retaining bolts.
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15.
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Carefully prise loose the rail using 2 pry bars or the like.
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16.
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Carefully lift the rail up and away.
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17.
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Plug the nozzle orifices.
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Important
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Make sure the connectors are connected to the correct injectors according to the markings on the cables. It is essential that the injectors be fitted with the connector pointing straight up.
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