Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car


Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
- System of injection
   - System of injection of Mono-Motronic
      Operating procedure
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Check of the mode of idling and analysis of exhaust gases
      Check of catalytic converter and lambda probe
      Hummock drive of "gas"
      List of malfunctions
   + System of injection of Digifant
   + System of injection of KE-III-Jetronic
   + Systems of injection of MPI and MPFI
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications




Check of the mode of idling and analysis of exhaust gases

At system of injection of Mono-Motronic adjusting works are excessive because in this system there is nothing to regulate more.

The control unit corrects if necessary rotation frequency in the idling mode. Only in doubtful cases it is necessary to recheck the frequency of rotation or the contents WITH in the idling mode. Conditions of check are: working temperature of the engine, shutdown of all consumers of the electric power and correct installation of the moment of ignition. Standard indicators are:

  • Rotation frequency in the idling mode: 750 – 1000 rpm.
  • The test for the contents WITH in exhaust gases: 0,2 – 1,2% in a measuring tube.

If you received other indicators, it is necessary to check vacuum tubes and the electromagnetic valve of system of evaporation of fuel and to interrogate memory of the store of malfunctions.

If you always carry out servicing of the car in a workshop, know that the test for toxicity of exhaust gases is included anyway into the volume of annual inspection check.

But even in case you are engaged in servicing of the car, we recommend carrying out this dough in Audi workshop. There reading of records of the store of malfunctions is carried out and they are erased from his memory that the usual workshop cannot make.