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

Visual check


  1. For a start check air ducts for tightness! It is necessary to check all hoses – from a thick sleeve of an air inlet to thin vacuum hoses.
  2. Whether as it should be sealing laying under the starting fuel valve and on vpryskny nozzles, and also flange laying of inlet channels?
  3. Not tight places open access to unaccounted air, that is air which is not considered by an air flowmeter and therefore significantly disturbs mix preparation. Mix is nekontrolirovanno impoverished. A consequence of it are malfunctions in operation of the engine and rough idling.
  4. Whether it is possible to distinguish leakage of a fuel-supply line? Whether tips of wires
  5. were repeatedly separated and again connected? Corrosion or inept actions can lead to insufficient contact.
  6. Attentively consider plugs of separate components of system of injection. Do not bend uvulas of contacts but only process contact spray.