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
3. Lubrication system
+ 4. Cooling system
- 5. Fuel system
   - 5.2. Systems of injection of fuel
      5.2.1.2. Specifications (4-cylinder models)
      5.2.1.3. Components of system of injection for 5-cylinder models
      5.2.1.4. Specifications (5-cylinder models)
      5.2.1.5. Starting position of a plate of the sensor of an air stream
      5.2.1.6. Free wheeling of a plate of the sensor of an air stream
      5.2.1.7. Lever of a plate of the sensor of an air stream
      5.2.1.8. The operating plunger
      5.2.1.9. Throttle valve
      5.2.1.10. Rope of management of a butterfly valve
   5.2.2. Fuel injectors (20-valvate models)
   + 5.2.3. Electronic control system of the MPI engine
+ 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



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5.2.1.2. Specifications (4-cylinder models)

GENERAL INFORMATION

Engine code
3A
Installation of a corner of an advancing of ignition
test value
4 ° – 8 ° before the top dead point
adjusting value
6 ± 1 ° before the top dead point
Idling speed (speed is not regulated, kontorolirutsya by system of stabilization of idling)
 780 – 900 ob./min.
Contents WITH:
test value (in a tube for measurement WITH)
0,2 – 1,2 about. %
adjusting value (adjustment is carried out by means of a current setting of the regulator of pressure difference)
0 – 5 (floating value)
Number of the CIS-E Motronic control unit
893 907 404
Number limit ob./min.
6300 – 6500
Delay of supply of fuel by means of change of a napravlyaeniye of the operating current in pressure difference regulator
Throttle switch
switching points:
The switch I – the switch of the mode of the holotsy course
0.15 – 0.5 mm between a point of operation of the switch and a stop of the lever of a throttle
The switch II – the switch of the mode of completely open butterfly valve
10 ° ± 2 ° to a full stop


Pressure in system

 6.1 – 6.5 bar (manometrical pressure)

Pressure difference:
 1 - the electrosocket is disconnected from pressure difference regulator  about 0.3 - 0.5 bars are lower than pressure in system
 2 - the electrosocket is connected to pressure difference regulator (include a starter approximately for 3 seconds)  about 1.3 - 1.6 bars are lower than pressure in system
Residual pressure:

after at least 10 minutes

3.3 bar (manometrical pressure)
after at least 20 minutes 3.2 bar (manometrical pressure)
Fuel injectors:
working pressure  3.7 – 4.8 bar (manometrical pressure)

tolerance of amount of injectable fuel in a set of injectors:

measurement in the idling mode (a position 1 of the tool 1348/1) at amount of injectable fuel of 20 ml at most 2.0 ml
measurement in the mode of completely open butterfly valve (a position 2 of the tool 1358/1) at amount of injectable fuel of 80 ml at most 8.0 ml
Pressure difference regulator resistance  15 – 20 Ohms
Example 1: 2500 Ohms at 20 °C  

Example 2: 200 Ohms at 100 °C

 
Start valve resistance from a cold state about 10 Ohms

Resistance of the temperature sensor between plugs