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
      The major knots
      So the system of injection of Motronic functions
      Violations in work and self-diagnostics
      The self-help at injection
      Visual control
      Search of malfunctions in separate knots
      Check of idling and exhaust gases
      Check of exhaust gases (AU)
      Cable of a butterfly valve
      The help at malfunctions
   + System of injection of MPI and MPFI
+ 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





Check of exhaust gases (AU)

In Germany in cars with the adjusted catalytic converter the first verification of the content of exhaust gases in three years after date of the first admission is offered and then every two years, thus also installation of ignition and efficiency of the catalytic converter is checked. If Audi is necessary "the main check" in DEKRA or in TUV, in the beginning it is necessary to carry out an inspection of composition of exhaust gases. By our experience, most quicker it becomes in the certified workshops. For saving of time it is possible to add still that in Audi workshop always there are available latest adjusting data which other workshops, including DEKRA or TUV, obtain with a certain delay.

When checking the system of an exhaust has to be in working order, and in an inlet collector there should not be an air suction through not tight sites. Besides, be convinced that the air filter pure and distance between electrodes of spark plugs the correct. In addition, after a driving for several months it is recommended to replace oil with short distances. The fuel condensate which got into engine oil worsens indicators of exhaust gases.

When checking the car is connected to an expensive tester in a workshop which printing device generalizes the received measuring sizes for confirmation of the passable check. If the separate set sizes are not reached, there is no confirmation of the passable check. Before replacing expensive knot after not passable check of composition of exhaust gases, repeat check in other workshop. Despite expensive measuring equipment, in results of measurements the dispersion meets. Sometimes rather long trip during which the engine, the lambda probe and the catalytic converter reach full working temperature.