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





Self-help

Way of action

Unfortunately, many types of checks are inaccessible to the fan due to the lack of the necessary control devices. Nevertheless nevertheless there is a certain field for activity.

The control unit cannot be checked amateur means. But also in practice in this area defects arise seldom. Incomparably more often the reason for claims is given by sensors, switches and connections of wires.

Therefore at emergence of defect it is recommended to work as follows:

  • Whether as it should be all safety locks which are connected with injection (No. 28, 29, 32 and 34)?
  • Be convinced that ignition as it should be.
  • Check fuel supply.
  • Carry out a visual inspection of knots of system of injection.

  • If as a result of the listed checks the source of malfunctions is not found, study at the end of this chapter the section Help at malfunctions, reveal possible sources of malfunctions, check suspicious knot according to the instruction.
  • If it did not lead to success, consider in a workshop the control unit computer within diagnostics of the car. But it is possible only in case before the accumulator was not disconnected. Otherwise information in a memory is completely erased.