Audi A3

since 1997 of release

Repair and car operation

Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
- Power supply system and production of the fulfilled gases
   - Power supply system
      Removal and installation of the fuel pump/sensor of a stock of fuel
      Removal and installation of the fuel filter
      Adjustment of a drive of gas
      Removal and installation of the case of the air filter
      Connection of remote control by the fuel pump for carrying out checks
      Check of the fuel pump
      Check of the relay of the fuel pump
   + System of injection of fuel
   + System of injection of the diesel engine
   + System of production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema


Power supply system


Fuel tank, fuel pump and fuel filter

1-hose of a modulation of fuel
2-sealing ring. It is necessary to replace surely.
3-gravitational valve. For valve removal
4-ventilating трубка*
To an adsorber.
5-stopper of a fuel tank
The damaged sealing ring replace.
6-sealing ring
7-rubber cup
8-ventilating valve
9-connection with weight
10-screw, 10 N • m
11-ventilating pipes
12-fuel tank
13-collar, 2 N • m
15-bolt, 25 N • m
16-tightening nut, 2 N • m
18-collar of fastening of a tank
Pay attention to distinction in lengths.
19-топливопровод, black
To the engine. When undocking press clamps on the quick disconnect coupling.
20-fuel фильтр*
The arrow on the case of the filter specifies in the channel direction. Instruction: at carrying out service the filter does not change.
21-хомут*. For the fuel filter.
22-sealing ring. In the presence of damage replace. At installation moisten with fuel.
23-the level sensor the giving fuel/block with fuel насосом*
24-cap nut, 60 N • m
25-топливопровод, black. To the engine. When undocking press clamps on the quick disconnect coupling.
26-returnable топливопровод, dark blue. From the engine. Joins «R» marking a locking flange. When undocking press clamps on the quick disconnect coupling.
*) only for the petrol engine.

The power supply system consists of a fuel tank, топливопроводов, the filter, the fuel pump and system of injection of fuel (the separate Section).

The fuel tank made of plastic, is located at the car bottom before a back suspension bracket. The available stock of fuel is shown to the driver on the dashboard. Ventilation of a fuel tank is carried out through the closed system of removal of air. At the petrol engine harmful pairs of gasoline gather in an adsorber and move in chambers of combustion of the engine.

Essential influence on fuel consumption renders style of driving of the car. Some councils on the reasonable address with a gas pedal below are given.

1. After engine start at once get under way from a place even if it occurs on a frost.
2. At a car stop for a while more on 40 with, switch off the engine.
3. Move always on the highest transfer.
4. At movement on big distances whenever possible support uniform speed. Avoid movement on high speeds. Operate the car circumspectly. Without need do not brake.
5. Transport the car excessive cargo. If the luggage carrier is not used, remove it from a roof.
6. Check pressure of air in tires. Do not allow excessive pressure decrease.


At work with fuel system it is necessary to observe the following security measures and purity:
Do not use near a workplace open fire, do not smoke and do not hold any strongly warmed up subjects. There is a danger of accident! Keep in readiness the fire extinguisher.
Watch normal ventilation of a workplace. Fuel pairs are poisonous.

7. The fuel system is under pressure. When opening system fuel can escape under pressure. Collect fuel a rag. Use goggles.
8. Shlangovye connections fasten by means of tape or tightening collars. It is necessary to replace tightening collars with tape collars or collars of the last design surely. For installation of tape collars there is a special adaptation, for example HAZET 796-5 or AUDI-1921.
9. Connections and places adjoining to them before opening carefully clear.
10. The removed details stack on a pure lining and close. Apply for this purpose polyethylene or paper. Do not apply for this purpose a fibrous fabric!
11. Carefully close open details or put technological caps if repair lasts some time.
12. Establish into place only pure details. Spare parts take out from packing only directly ahead of installation. Do not apply details which were stored unpacked (for example, stored in a tool box).
13. At open fuel system do not apply whenever possible compressed air. Whenever possible do not move thus the car.
14. Do not apply some hermetics containing silicone. The elements which have got to the engine of silicone in the engine do not burn down and damage the oxygen sensor.


Before removal of a tank merge from it fuel or pump out fuel pump specially provided for this purpose.
The fuel tank acts in film from the bottom party of the car. Before a detachment of collars of fastening of a tank bring to it from below a jack and linings.
The empty tank is explosive and cannot be utilized in such look. Before utilization the tank should be cut on a part. Watch that thus there was no spark. For this purpose hand over a fuel tank in the specialized enterprise.
After tank installation into place start the engine and check tightness of all connections.