Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation


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
- Injection system
   + 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 a 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 electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications



Check of a mode of idling and analysis of exhaust gases

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

Arrangement of a drive of gas at the engine in capacity of 85 kW; figures designate: 1 and 4 – хомутики; 2–hummock drive of an accelerator; 3–protection of the tip; 5–lock segment of a cover of a hummock drive of an accelerator.

At system of injection of Digifant adjusting works are not required, because this system is being self-trained. It means that the control unit if necessary corrects frequency of rotation in an 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 by V. A. G 1551 after at first was interrogated memory of the store. Standard indicators of frequency of rotation or the contents WITH in an 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:

  • Frequency of rotation in an 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 should know about the analysis of exhaust gases, check of effect of catalytic converter, check a lambda probe and a 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.