Check of functioning and replacement of fuel injectors. BMW the 5th E28/E34 series (from 1981 to 1993 of release)
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
3. Cooling system
4. Power supply system
4.1. General information
4.2. Pressure removal in system of injection of fuel
4.3. Check of pressure of fuel / fuel pump
4.4. Removal and installation of the fuel pump, intermediate pump and fuel level sensor
4.5. Repair and replacement of fuel lines and connectors
4.6. Removal and installation of a fuel tank
4.7. General information about cleaning and repair of a fuel tank
4.8. Removal and air purifier installation
4.9. Check, adjustment and replacement of a cable of an accelerator
4.10. General information about the carburetor
4.11. Removal and carburetor installation
4.12. Cleaning and carburetor adjustment
4.13. General information about fuel injection
4.14. Systems of injection of fuel
4.15. Check of functioning of system of injection of fuel
4.16. Functioning check, removal and installation of a measuring instrument of a stream of air
4.17. Functioning check, removal and installation of the case of a throttle
4.18. Check of functioning and replacement of a regulator of pressure of fuel
4.19. Check of functioning and replacement of an injector of cold start and temperature switch
4.20. Check of functioning and replacement of fuel injectors
4.21. Functioning check, adjustment and replacement of the air valve of stabilization of idling
4.22. Search of malfunctions of system of injection of fuel
4.23. Diagnostics of malfunctions of a power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








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4.20. Check of functioning and replacement of fuel injectors

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

 PERFORMANCE ORDER

  1. 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).

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.

  1. At work injectors create a steady sound of clicks.
  2. Increase turns of the engine above 3500 rpm. Frequency of clicks should increase with engine turns.
  3. 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.
  1. 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.

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

 PERFORMANCE ORDER

  1. 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).
  1. Disconnect from the fuel highway fuel hoses and unscrew bolts of fastening of the fuel highway (are shown by shooters).
  1. Remove from the inlet pipeline fuel highways/injectors assembled.
  2. 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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4.19. Check of functioning and replacement of an injector of cold start and temperature switch
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4.21. Functioning check, adjustment and replacement of the air valve of stabilization of idling