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
   - System of injection of KE-III-Jetronic
      Basic elements
      Operating procedure
      Lambda regulation
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Search of malfunctions
      Removal of components
      Check of the mode of idling and analysis of exhaust gases
      List of malfunctions
   + 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

Independent repair

Unfortunately, numerous inspections of system of injection cannot be carried out in house conditions due to the lack of necessary instrumentations. However the defined field of activity nevertheless remained.

Operations procedure

The control unit cannot be checked by house means. Practice shows also that from this party of a malfunction trap extremely seldom. Bring sensors, switches and connections of wires much more often. Therefore in the presence of a malfunction it is necessary to work as follows:


  1. Check, whether as it should be system of ignition.
  2. Check supply with fuel.
  3. Carry out a visual inspection of elements of system of injection (see the following section).
  4. If thus malfunction was not found, see the list of malfunctions at the end of the head. Or check the store of malfunctions in a workshop. Thus find out a possible source of malfunctions, check a suspicious detail according to the scheme of control.