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
   - Systems of injection of MPI and MPFI
      Operating procedure
      Lambda regulation
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Removal of elements
      Hummock drive of "gas"
      Check of the mode of idling and analysis of exhaust gases
      List of malfunctions
+ 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! All hoses – from a thick sleeve of an air inlet to thin vacuum hoses have to be checked.
  2. Whether as it should be sealing laying of 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 system and therefore significantly disturbs mix preparation. Mix is nekontrolirovanno impoverished. The malfunctions in operation of the engine which are shown first of all in rough idling are a consequence of it.
  4. To warm up the engine up to the working temperature, then to leave to work at single turns, to open a cowl, to separate plug connection to a lambda probe.
  5. To sprinkle from the spray containing starting fuel (for example "Startpilot") sealing flange laying of inlet channels and other details inspiring suspicion.
  6. If the frequency of rotation changes when spraying a certain place, so there was a leakage.
  7. Whether it is possible to distinguish leakage of toplivoprovodny hoses? Whether tips of wires
  8. were repeatedly disconnected and are again connected? Corrosion or inept actions can lead to insufficient contact.
  9. Attentively consider plugs of separate components of system of injection. They can only be processed contact spray, but not to bend at all that can cause malfunctions.