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

Removal of components

Removal of vpryskny nozzles

It is not necessary any additional descriptions on dismantle for many components of system of injection. Where explanations are necessary, you will read them in the following sections.


  1. To remove the top part of an inlet collector.
  2. To turn off fixture of vpryskny nozzles.
  3. Flat-nose pliers to extend a nozzle together with a nozzle.
  4. The fuel-supply line remains connected in order that dirt did not get to a nozzle.
  5. At installation it is necessary to moisten with gasoline rubber sealing rings of a nozzle, and also inserts to achieve easy installation on a sealing surface.
  6. If the nozzle is put on "nasukhy", there is a danger that the rubber ring will be flattened and there will be no appropriate consolidation. It will be expressed in failures in behavior of the engine because of hit of unaccounted air, for example in rough work in the idling mode.
  7. The damaged or cracked sealing rings should be replaced surely.
  8. To tighten bolts of fastening of nozzles the moment of 10 N • m.

Removal of a sleeve of an air inlet

The thick sleeve between the proofreader of composition of gas mixture and the case of throttle knot needs to be removed, at least partially, during various works on repair of system of injection:


  1. To weaken collars on the proofreader of composition of gas mixture and the case of throttle knot.
  2. To weaken collars of other hoses of an air duct on an air inlet sleeve. From them it is possible to call: a hose to the operating valve of stabilization of frequency of rotation of a shaft of the engine in the idling mode, to the air channel of vpryskny nozzles, etc.
  3. To remove air duct hoses.
  4. To remove the valve of system of evaporation of fuel.
  5. To remove an air inlet sleeve.
  6. At installation to insert a grid over the proofreader of composition of gas mixture camber up. To pay attention to a mark of "oben" (top).

Removal of the top part of an inlet collector

At the left: removal of a sleeve of an air inlet. Shooters point to details which have to be removed or turned off.

On the right: the hummock drive of "gas" (3) is fixed on the lever of a butterfly valve (5) by means of two fixing brackets (1 and 2). Regulation of the hummock drive of gas is made by means of the adjusting plug of a tip of a cable (4).


  1. To remove an air inlet sleeve.
  2. To disconnect a cable of the drive of "gas" and to take out it from a countersupport.
  3. To remove the plug of the sensor of angular movement of a butterfly valve.
  4. To remove air duct hoses.
  5. To weaken internal flange fixing bolts and to remove an inlet collector.
  6. At installation it is obligatory to use new flange sealing laying.
  7. To tighten flange fixing bolts in two calling up to the final size of 20 N • m.