Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
- Injection system
   + System of injection Mono-Motronic
   - System of injection Digifant
      Operating procedure
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Removal впрыскных atomizers
      Check of a mode of idling and the analysis of exhaust gases
      The list of malfunctions
   + System of injection KE-III-Jetronic
   + Systems of injection MPI and MPFI
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


Visual check

Негерметичность in the field of admission system opens access to the "not considered" air, that is air which is not considered at a monitor and consequently essentially disturbs to mix preparation. The mix неконтролированно is impoverished. Most clearly this malfunction is shown in unstable frequency of rotation at idling.


    To check up density прилегания vacuum hoses and presence of cracks. All hoses on an inlet collector (for example the amplifier of brakes, preliminary heating of inlet air, the electromagnetic valve of system of evaporation of fuel) should be checked up. To warm up the engine and to leave it to work on single turns, to open a cowl cover. To sprinkle from a spray containing a fuel spray (for example, Startpilot) the case of throttle knot, consolidation of flanges of inlet channels and pipelines to units operated depression (to disconnect plug connection from a ljambda-probe). If at spraying of a certain place frequency of rotation of the engine changes, means, there has arisen негерметичность. Whether it is possible to distinguish негерметичность топливопровода? Whether tips of wires have been repeatedly separated and again connected? Corrosion or inept actions can lead to insufficient contact. Attentively consider tips of separate components of system of injection. Contacts not to bend, and to process a spray.