Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car

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


The potentiometer of a throttle displays every time the provision of a throttle and its change. During acceleration, the equipment of management obtains information on how quickly and on what corner the butterfly valve is inclined. The closed throttle informs the equipment of management on further work of the engine idling.

Measurement of resistance of a potentiometer of a throttle

1) take a plug with the wires feeding a potentiometer
2) measure all resistance of a potentiometer between the terminations 1 and 3. The normal amount has to equal: 1.4–1.6 kOhm
3) start the engine and leave it to idle
4) remove the pipeline of removal of air between the regulator of provision of a throttle and the filter of system of airing. From the filter establish a cap. For this purpose it is possible to use bolts of the corresponding diameter
5) kill the engine. The butterfly valve has to close a mouth completely
6) measure resistance between the terminations 1 and 2 of a potentiometer and at the same time reject a butterfly valve to situation "full gas". Resistance has to decrease smoothly up to the initial size of 1.4-2.4 kOhm at the "closed" butterfly valve up to the size less than 270 Ohms in the provision of "full opening" of a butterfly valve
7) take out a cap from the pipeline of removal of air and put on the pipeline the union at the air filter
8) connect a plug to a potentiometer