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4-20-proverka-funkcionirovaniya-i-zamena-toplivnykh-inzhektorov.html
4.20. Check of functioning and replacement of fuel injectors
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Fuel is extremely inflammable, therefore at work with any part of fuel system accept additional precautionary measures. Do not smoke and do not allow emergence near a working zone of open fire and lamps without plafonds. Do not work in garages with the equipment at natural gas with a match (such as heaters of water and dryers for clothes). At fuel hit on skin immediately wash away it water with soap. At carrying out any works with fuel system use goggles and keep in readiness the fire extinguisher. |
Check
Check on the car
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- By means of a mechanical stethoscope (available in the majority of shops of autoaccessories) check at operation of the engine idling existence of clicks in each injector (look an illustration).
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If there is no mechanical stethoscope, to check clicks in injectors it is possible to check by means of a screw-driver. Establish the screw-driver end on an injector, and the handle press to an ear. |
- At work injectors create a steady sound of clicks.
- Increase turns of the engine above 3500 rpm. Frequency of clicks should increase with engine turns.
- If the injector does not function (there are no clicks), get in shop of autoaccessories a special lamp for check of injectors and connect it to the electric socket of an injector. Start the engine and be convinced, resistance that the lamp blinks. It means that on an injector the correct tension therefore the injector is faulty arrives.
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- Disconnect the socket of each injector and check resistance of injectors. Compare results with given in the Size table and adjusting data at the end of the Management of values. Replace all injectors with the wrong value of resistance.
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Volume check
As carrying out check of volume of an injector needs a special tester of an injector, this procedure is outside of possibilities of a house workshop. Charge carrying out check of volume of injectors to the dealer of BMW or other expert.
Replacement
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- Disconnect the main electric socket of a cable of fuel injectors. Remove the inlet pipeline (look Honour the Repair work which is carried out without extraction of the engine from the car).
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- Disconnect from the fuel highway fuel hoses and unscrew bolts of fastening of the fuel highway (are shown by shooters).
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- Remove from the inlet pipeline fuel highways/injectors assembled.
- Installation is return to removal. Do not forget to replace all rings of round section. For prevention of damage of rings at installation grease them with a thin layer of impellent oil. Create in fuel system pressure (establish a safety lock of the fuel pump and include ignition) and before start of the engine check existence of leaks.
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