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



The list of malfunctions

System of injection Digifant

 Malfunction
Its reason
Than to help
A.Holodnyj the engine is not got absolutely or very badly 1. A faulty safety lock 13, 21, 25, 27 or 28
2. The faulty relay of a food
3. The fuel pump does not deliver fuel absolutely or very badly
4. The starting valve does not inject fuel or негерметичен
5. A faulty regulator of pressure of fuel
6. The faulty gauge of temperature of a cooling liquid
7. A faulty potentiometer throttle заслонки
8. The faulty block of management
9. The plait of wires between the gauge of the Hall and the management block is damaged
9. In the engine "not considered" air arrives
To replace

To check up, if necessary to replace
Whether there is in general a gasoline in a fuel tank?

To check up the pump, to measure quantity of delivered fuel
To check up the starting valve

In a workshop to measure pressure

To check up in a workshop

To check up in a workshop
To check up cable passage

To check up all pipelines

V.Progretyj the engine is not got absolutely or got badly 1. The vacuum hose conducting to a regulator of pressure of giving of fuel is damaged
2. See And 2 – 9
3. Негерметичны впрыскные atomizers
To check up the pipeline


To check up atomizers

S.Dvigatel is got, but again глохнет 1. The stabilisation valve in an idling mode does not work
2. See А7
To check up the valve

To check up functioning, if necessary to replace

D. The cold engine shivers in an idling mode 1. See And 6
2. See With 1
3. The block of management by an automatic transmission and a potentiometer throttle заслонки are not co-ordinated with each other (only after replacement of details)
To spend in a workshop the coordination
E.Progretyj the engine shivers in an idling mode See С1  
F. Idling turns decrease at full turn of the steering mechanism See С1  
G. The engine works with faults 1. The fuel filter is hammered
2. See А3
3. See В3
4. See С4
To replace the filter
Н. Fluctuating frequency of rotation at 2000-3000 rpm See А7  
I. The Engine works with faults, глохнет See А3  
J. Insufficient capacity of the engine 1. See А3, 7 and 10
2. See С3
4. Throttle заслонки do not rise in position of full "gas"
To adjust тросовый a gas drive
K.Obratnye of flash in an inlet collector See А5  
L. Too high expense of fuel See А6 and 7