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 and adjustment of maintenance of CO


Contents WITH in exhaust gases is shown the special measuring instrument of tension connected to the control plug placed in the camera of the engine. Certain light impulses of diodes of the measuring instrument demonstrate a certain maintenance WITH. It is not necessary to use any other testing lamp as the big gap of current can cause failure of electronic systems.

1) turn on tension measuring instrument between a control plug 1 (a separate plug on the end of a blue cable) and a positive clip of the accumulator
2) start the engine and within about 1 minute at a speed of rotation more than 2000 rpm warm it that the probe Lambda reached normal working temperature
3) it is necessary to observe the shining measuring instrument diodes. At a speed of rotation corresponding to turns of idling of the engine, diodes have to flicker with a frequency of 1.5 times a second. It means that contents WITH is admissible the probe Lambda
4) perform exact measurement of contents WITH by means of the analyzer of exhaust gases. If, despite the correct indicators of a diode tester, the valid size WITH measured by means of the analyzer of exhaust gases is behind admissible norm, it is necessary to check the probe Lambda
5) if the diode of a tester shines constantly, it means that fuel-air mix of idling very "rich". If the diode of a diode tester does not shine, it means that fuel-air mix very "poor"
6) blinking of the shining diodes with a frequency of 25 in sec. means that the probe Lambda is damaged or damaged a connecting wire of the probe


The probe Lambda can be smoked that will be the reason of faulty work. 20-minute bystry driving in the country will remove a possible zakopchennost then it is necessary to make check anew.

7) take out a probe Lambda wire plug from a nest 1. The nest should be insulated an insulating tape
8) it is necessary to observe indications of a diode tester. The shining diodes have to flicker
9) remove a safety overlay of an adjusting bolt And contents WITH in exhaust gases. It is necessary "to make a hole" in a plastic cap, and then to screw a screw in a cap and to take out all this together
10) rotating the small screw-driver an adjusting bolt And to the left and to the right, to establish the required contents WITH in exhaust gases. During adjustment the fan of the cooling system should not work
11) the adjusting bolt before rotation needs to be protected, having pressed a new plastic cap
12) disconnect the SO measuring instrument from a measuring tube in the forward muffler, and close a measuring tube
13) disconnect a diode tester
14) shoot the insulating film and anew connect a probe Lambda wire plug to a nest
15) connect the pipeline of removal of air to an eliminator of air of the main oil case