E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
- 7. Exhaust system
   + 7.1.2. Exhaust system of cars 318i
   - 7.2. System of decrease in toxicity of exhaust gases
      7.2.2. Self-diagnostics of system of injection of Motronic
      7.2.3. Processor block (ECU block)
      7.2.4. Sensors of system of automatic control of the engine
      7.2.5. System of compulsory ventilation of a case (PCV system)
      7.2.6. Catching system паров gasoline (EVAP system)
      7.2.7. Catalytic converter
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


7.2.6. Catching system паров gasoline (EVAP system)


Catching system паров gasoline (M10 engine)

1. Converter
2. Oxygen sensor
3. Ignition distributor
4. Hose of a vacuum regulator
ignition advancings
5. Receiver
6. Fuel tank
7. A tank with an absorber
8. Butterfly valve
9. Stream measuring instrument
10. Air filter

This system is intended for catching паров gasoline from fuel equipment at the expense of absorption in a tank with absorbent carbon. At car movement the valve of a purge is slightly opened also pairs подсасываются in a collector and are burned in engine cylinders. Idling and at warming up of the engine of pair valve of a purge is closed, that not переобогатить a mix.

On considered cars valves of a purge of 2 types – with an electromagnetic and pneumatic drive are established. The valve is mounted on a soaking-up collector or at a tank with an absorber.

At malfunction in system abnormal operation of the heated-up engine is observed. Malfunction in this system does not influence engine start-up.


Purge pneumovalve
1. Disconnect from the valve hoses and blow via the bigger union, – air should not pass. On a part of cars the thermopneumovalve which opens at liquid temperature in system of cooling 46 ° Page is provided. This valve is usually mounted on a soaking-up collector, near the temperature sensor.
2. Be convinced that at depression creation on the small union air passes through the valve freely.
3. If check yields negative result, the valve replace.
The valve with electromagnetic management
4. Disconnect from the valve hoses and wires.
5. Be convinced that at ignition inclusion from the valve click is listened.
6. Otherwise check tension on the valve.
7. If tension is, the valve replace. Otherwise check the processor block and conducting.
Tank with absorbent carbon
8. Disconnect hoses from a tank, previously having marked them.
9. Remove a tank. At detection of damages a tank replace.