Audi A4

since 1994 release

Repair and operation of the car


A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
- System of injection
   + System of injection of Motronic
   - System of injection of MPI and MPFI
      Additional functions
      Knots of system of injection
      Functioning
      Adjustment with the help a lambda probe
      Violations in work and self-diagnostics
      Self-help
      Visual control
      Check of knots
      Dismantle of separate details
      Cable of a butterfly valve
      Inlet collector
      Idling adjustment
      Check of exhaust gases
      The help at malfunctions
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics



Dismantle of separate details

Many details of system of injection do not need the additional description of dismantle. Exceptions are described in the following sections.

Replacement lambda probe

 PERFORMANCE ORDER

  1. Disconnect the wire socket, weaken a wire collar.
  2. Before installation grease a carving with assembly paste from Audi workshop. On probe vents paste should not get.
  3. Correct moment of an inhaling lambda probe: 50 Nanometers.

Shtekerny sockets behind at the left in a motive compartment

1 – detonation sensor II (blue);
2 – heating and signal lambda probe (probe at the left; black);
3 – ignition coils (the bringing wire; white);

4 – sensor of the moment of ignition (black);
5 – sensor of number of turns of the engine (gray).

Shtekerny sockets behind on the right in a motive compartment

1 – heating and signal lambda probe (probe on the right; black);

2 – detonation sensor I (blue).

Dismantle of the measuring instrument of mass of air

 PERFORMANCE ORDER

  1. Weaken a collar of an airintaking hose.
  2. Disconnect the socket of the measuring instrument of mass of air.
  3. Dismantle the top part of the case of the air filter with the measuring instrument of mass of air as it is described in the head the Air filter and channels of absorption.

Dismantle of valves of injection

Injection valves (white shooters) can be dismantled only together with a distributive tube of fuel. For this purpose weaken fixing bolts of a distributive tube (black shooters).


 PERFORMANCE ORDER

  1. Dismantle the soaking-up hose between the air filter (the measuring instrument of mass of air) and the engine.
  2. Disconnect and put aside wires of a high voltage.
  3. Disconnect sockets of valves of injection.
  4. Unscrew a distributive tube of fuel from an inlet collector on the engine.
  5. Disconnect a vacuum hose from the fuel pressure regulator.
  6. Pick up the distributive phone of fuel with injection valves from an inlet collector on the engine up.
  7. To dismantle the separate valve of injection, remove the fixing bracket from a distributive tube and take out the valve.
  8. Installation: before installation replace rubber rings of round section on all valves of injection.
  9. Grease all rubber rings of round section with new engine oil.
  10. Very carefully and on one insert injection valves so that any of rubber rings of round section was not squeezed or damaged.