Diagnostics of malfunctions of a power supply system. 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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4.23. Diagnostics of malfunctions of a power supply system

Symptom Possible reason
Fuel consumption is excessive The filtering element of an air purifier is polluted or its passableness (is otherwise broken see. Head Routine maintenance of the car).
Installation of a corner of an advancing of ignition (is broken see. Head ignition System).
Functioning of systems of decrease in toxicity of the fulfilled gases (is broken see. Head of the Control system of the engine and decrease in toxicity of the fulfilled gases).
Internal components of system of injection of the fuel/carburettor (are excessively worn-out or damaged see. Head Power supply system).
Pressure of a rating of tires does not suffice, or tires not that standard size (are established see. Head Routine maintenance of the car).
The unsuccessful manner of driving is chosen, or the adverse effect of external factors takes place.
Leakages of fuel take place, or distinctly smells as gasoline

At emergence of suspicions on existence of leaks fuel should be suspended operation of the car immediately - leaks in an impellent compartment can be at the bottom of ignition!

Defect of lines of supply of fuel, or fuel tank ventilation (takes place see. Head Power supply system).
The fuel tank is overflowed.
Injectors the fuel/carburettor are excessively worn-out, or tightness of laying of components of a power supply system (is broken see. Head Power supply system).


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4.22. Search of malfunctions of system of injection of fuel
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5. Ignition system