Audi A4

since 1994 release

Manual of the car

Audi A4
+ Running gear
+ Regular servicing
+ Engines
- Turbo-supercharging
   Draft switching off valve
   Check of adjustment of pressure of pressurization
   The help at malfunctions
   The turbocompressor is faulty?
   Radiator of nadduvochny air
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ 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


The help at malfunctions


The turbine of a turbocompressor (2) is put in action by pressure of the following exhaust gases. The bladed wheel (1) on the party of absorption is set in motion by the passing shaft with a big frequency of rotation at the expense of what the soaked-up air can be condensed. Much more air, providing the increased power or higher torque comes to combustion chambers. As soon as pressure in the camera of absorption becomes higher necessary, the vacuum box of adjustment (3) pressure of pressurization opens bypass the channel and passes a part of exhaust gases by a turbocompressor in system of an exhaust. The electromagnetic valve of adjustment of pressure of pressurization for taking note of heights on pressurization pressure is built in the operating tube (4).

a) Air;
b) Exhaust gas.

If Audi Turbo develops much the lowered power or the maximum speed is not reached, the reason can be in a faulty turbocompressor.

Before search of malfunctions it is necessary to be convinced that the engine and system of injection in serviceability.

Your help

A. Details of system of an exhaust and a turbo-supercharging are untight

1. The air hose between the compressor and an inlet collector over a radiator of nadduvochny air is untight or was disconnected
2. The site between an inlet collector and a head of the block of cylinders is untight
3. Flanges at an inlet collector are untight
4. The untight site between a final collector and a head of the block of cylinders or a turbocompressor
B. The turbocompressor is faulty 1. Check pressurization pressure. If it is too high:
check the electromagnetic valve of restriction of pressure of pressurization, check a vacuum box of the valve of adjustment of pressure of pressurization. If that and another in working order, conduct survey of the memory device of malfunctions in the car
2. Pressurization pressure too low:
check a vacuum box of restriction of pressure of pressurization. If it is serviceable, replace a turbocompressor