Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation

Audi 80/90/Coupe
+ 1.2. Car identification
- 2. Engines, carburetors
   2.1.2. Removal and engine installation (5-cylinder models)
   2.1.3. Dismantling and assembly of engines
   2.1.4. Head of the block of cylinders, gazoraspredeleniye mechanism
   + 2.2. Engine electric equipment
   - 2.3. Carburetors
      - Check and carburetor adjustment Check of turns of idling Check and adjustment of the maintenance of CO Fast check of functioning of the carburetor Probe check Lambda Check of the sensor of temperature of cooling liquid Check of an air diaphragm Check of a potentiometer of a throttle 2EE carburetor preset values
      + 2.3.2. Keihin carburetors
3. Greasing system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Ignition system
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
+ 13. Central air
+ 14. Electric equipment

dfe5d7b3 Check of an air diaphragm


Measurement of resistance of a regulator

The air diaphragm regulates fuel and air proportions in a mix which is soaked up in the carburetor during start-up of the cold engine, in a phase of heating of the engine and acceleration during driving with the cold engine. The regulator of provision of an air diaphragm moves it through system of levers. In essence, it is the small electric motor operated by impulses from the equipment of management, providing fast and exact change of provision of a diaphragm.

At the same time by means of the lever placed on the other side of an axis of a diaphragm, the section of the jet correcting turns of idling of the engine changes.


1) warm up the engine to temperature 60 ° With
2) muffle the engine
3) remove the air filter
4) moving a diaphragm, check, whether there is very big resistance in a place of its laying
5) start the engine and leave it to idle
6) watch a diaphragm and at the same time add gas, rotating the lever on about 1/3 turns between the provision of idling and complete opening of a throttle
7) the diaphragm should bend sharply towards situation "course is closed", and then to return to a starting position.
8) if the diaphragm does not change the situation, it is necessary to check resistance of a regulator of provision of a diaphragm
9) disconnect a plug from a regulator of provision of a diaphragm
10) by an ohmmeter measure resistance between the regulator terminations, its size should equal 0.9–1.7 Ohm
11) measure resistance between each termination and weight, whether there was a short circuit.
12) if a diaphragm regulator normal, it is necessary to check a throttle potentiometer
13) muffle the engine
14) connect the disunited elements of electroconducting
15) establish the case of the air filter