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
   - System of injection of Digifant
      Operating procedure
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Removal of vpryskny nozzles
      Check of the mode of idling and analysis of exhaust gases
      List of malfunctions
   + 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

On an illustration the plug of the valve of stabilization of idling (shooter) is removed to check the valve and conducting to it.

Gas drive arrangement at the 85 kW engine; figures designate: 1 and 4 – buckles; 2 – hummock drive of an accelerator; 3 – protection of the plug; 5 – lock segment of a cover of the hummock drive of an accelerator.

At system of injection of Digifant adjusting works are not required because this system is self-training. It means that the control unit if necessary corrects rotation frequency in the idling mode. Only in doubtful cases so-called main adjustment is made. It occurs not by means of inhalings of adjusting bolts, and by means of already mentioned device for reading of the store of malfunctions of V. A. G 1551 after at first memory of the store was interrogated. Standard indicators of frequency of rotation or the contents WITH in the idling mode (check conditions: working temperature of the engine, shutdown of all consumers of the electric power and correct installation of the moment of ignition) it:

  • Rotation frequency in the idling mode: 850 ± 50 rpm.
  • The test for the contents WITH in exhaust gases: 0,6 — 1,0% (measurement in a measuring tube WITH).

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

 Help: everything that you have to know about the analysis of exhaust gases, check of effect of catalytic converter, check a lambda probe and the hummock drive of an accelerator, you will find in the previous chapter "System of injection of Mono-Motronic".

Routine check of catalytic converter and lambda probe is carried out in a workshop as it is written in the section Check of Catalytic Converter and a lambda probe for system of injection of Mono-Motronic.