Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation


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
- Injection system
   - System of injection of Mono-Motronic
      Operating procedure
      Malfunctions and independent diagnostics
      Independent repair
      Visual check
      Check of separate elements
      Check of a mode of idling and analysis of exhaust gases
      Check of catalytic converter and lambda probe
      Hummock drive of "gas"
      List of malfunctions
   + System of injection of Digifant
   + System of injection of KE-III-Jetronic
   + 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 electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications



List of malfunctions

System of injection of Mono-Motronic

If you have no possibility to consider memory of the store of malfunctions the device in Audi workshop, you can try to find malfunction by means of our table of malfunctions.

 Malfunction
Its reason
Elimination
And. The cold engine is not got absolutely or very badly 1. Faulty safety lock 13, 21, 25, 27 or 28
2. Faulty conducting of the additional resistor of a vpryskny nozzle
3. The fuel pump does not deliver fuel absolutely or very badly
4. Faulty regulator of pressure of fuel
5. The faulty sensor of temperature of cooling means
6. Faulty potentiometer of a butterfly valve
7. Faulty control unit
8. A faulty plait of wires between the sensor of the Hall and the control unit
9. In the engine unrecorded air arrives 		To replace

To check, if necessary to replace

Whether there is in general a gasoline in a fuel tank?
To check the pump, to measure amount of delivered fuel
To measure pressure (in a workshop)

To check in a workshop

To check in a workshop
To check cable passing
To check according to the instruction about visual check

Century. The heated-up engine is not got absolutely or got badly 1. See. And 2-9
2. The vpryskny nozzle is not tight 		To check a nozzle
S.Dvigatel is got, but again глохнет 1. The regulator of provision of a butterfly valve does not work
2. See А6
3. Defective lambda probe 		To check a regulator

To check functioning, if necessary to replace

D. The cold engine shivers in an idling mode 1. See. And 5
2. See. With 1 		 
Е. The warm engine shivers in an idling mode See С1  
F. Turns of idling decrease at inclusion of strong consumers of power supply or at complete turn of the amplifier of the steering mechanism See С1  
G. The engine works with interruptions 1. The fuel filter is hammered
2. See А3
3. See В2
4. See С3 		To replace the filter
N. Fluctuating frequency of rotation at 2000-3000 rpm See А6  
I. The engine works with interruptions, глохнет Cм. А3  
J. Insufficient engine capacity 1. See А3, 6 and 9
2. See С3
4. The butterfly valve does not rise in the provision of full gas 		 
To. Return flashes in an inlet collector 1. See А4
2. See С3 		 
L. Too high fuel consumption 1. See А5 and 6
2. See С3 		 

 Help: at shutdown of the accumulator adjustment indicators of system of injection of Mono-Motronic are erased. It leads to that after food restoration the engine in a mode of idling works for some time not faultlessly. Most quicker process of self-restoration of adjustment indicators occurs during a trip lasting about 10 minutes.