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
      Adjustment with the help a lambda probe
      Violations in work and self-diagnostics
      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

Visual control


  1. Check air hoses for tightness. It is necessary to check all hoses – from a thick airintaking hose to a small vacuum hose from pressure regulator.
  2. As laying of valves of injection, and also laying on flanges of channels of absorption?
  3. Through not tight sites additional air, i.e. air which the system cannot consider in calculations and therefore process of preparation of fuel and air mix is noticeably broken comes to system of absorption. Working mix is uncontrolledly impoverished. It leads to violations in operation of the engine – generally idling.
  4. Warm up the engine and then leave it to idle, open a cowl, disconnect the socket a lambda probe.
  5. Purposefully water with a spray of starting fuel (for example, "Startpilot") laying of flanges of channels of absorption and other suspicious knots.
  6. If at a sprinkling of a certain site the number of turns changes, this site is not tight.
  7. Whether not tight places are visible on fuel pipes?
  8. Disconnect several times and again connect sockets of wires. Corrosion and nonprofessional breakthroughs can lead to contact damage.
  9. Attentively examine sockets of separate knots of system of injection. They can be processed only spray for contacts, the podgibaniye can lead to violations in work.