Audi A3

Since 1997 of release

Repair and car operation



Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
+ Systems of cooling, heating
- The power supply system and release of the fulfilled gases
   + The power supply system
   + System of injection of fuel
   + System of injection of the diesel engine
   + System of release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes



The power supply system and release of the fulfilled gases

THE GENERAL DATA

Specifications

ATTENTION

Separate characteristics are resulted also in the text of the Head and in case of compulsion of their performance are allocated by a bold type



Fuel

Petrol engines
All models, except 132 kw equipped with engines (AJQ): Neetilirovannyj gasoline is not worse PETROL–95
Application unleaded gasoline not worse PETROL–91 is supposed, thus capacity of the engine decreases.

Models with engines of 132 kw (AJQ): Neetilirovannyj gasoline is not worse PETROL–98. Application unleaded gasoline not worse PETROL–95 is supposed, thus capacity of the engine decreases.
Diesel engines
Diesel fuel
On DIN EN1) 590 Tsetanovoe number not less than 49
Biodiesel fuel
On Е DIN 51 606 РМЕ (a methyl aether of vegetable oil)
Almost does not contain some sulphur. Therefore at combustion РМЕ almost are absent allocation of dioxide of sulphur (S02).

Fulfilled gases contains less:
oxide carbon,
– Hydrocarbon,
– A soot.

Decrease in capacity and increase in the expense of fuel can take place insignificant.

In a cold season mainly fill diesel fuel. Application РМЕ is supposed at temperature to-10S.

At temperature less-10S it is necessary to add diesel fuel in a proportion 1: 1 to prevent curling of fuel РМЕ.

In winter conditions

At use of a summer variant of diesel fuel at temperature more low 0С there can come faults in engine work that speaks густением fuel as a result of paraffin allocation.

Therefore apply "winter" diesel fuel. Depending on mark winter fuel provides uninterrupted operation at temperatures from-15S to-22S.

Do not add gasoline to diesel fuel, etc. diluents.

At poor quality of fuel removal of water from a sediment bowl of the fuel filter probably is required to be made more often, than it is provided by the schedule THAT.

For water removal turn on a hand a carving stopper in the bottom part of the filter. The water congestion in the filter can lead to infringements of work of the engine.
Fuel tank
Volume of 55 l or 62 l on models with a full drive including a reserve stock 8 l
System of injection of the petrol engine
1.6 AEH Simos 2.1/Simos 2.2
1.8 AGN Motronic 3.8.5
1.8 AQA Motronic ME7.5
1.8T AGU Motronic 3.8.3
System of injection of the diesel engine Electronic with direct injection, a turbo-supercharging and cooling наддуваемого air
Idling turns, rpm
AEH 760 – 880
AGN 760 – 840
AGU, AQA 800 – 920
AJQ, APY  
1.9 TDI 875 – 950
The maintenance in the fulfilled gases on single turns
WITH, % макс. 0.5
NANOSECOND, ppm 100
CO2, % 14.5 – 16.0
СO2, % 0.1 – 0.5
The maintenance WITH on 2500 – 2800 rpm, % 0.3
Value лямбда 0.97 – 1.03
The maximum turns, rpm
AEH 6350
AQA, AGN, AGU 6800
Other petrol engines 6500
TDI (AGR, ALH) 4900 – 5100
TDI (AHF) 4800 – 5200
Adjustment of number of turns of idling and limiting number of turns within the limits of maintenance service is not required.
Regulator of pressure of fuel
Pressure of fuel, bar at single turns and  
The put on vacuum hose 2.5
The removed vacuum hose 3.0
Through 10 mines after a stop (at 20С) 2.0
Injectors
Injection volume for 30 with, ml
AGN 85 – 105
AGU 110 – 130
AQA 133 – 157
Resistance of injectors (at 20С), the Ohm
AGN, AGU 12 – 15
AQA 12 – 17
AEH 14 – 17
Resistance of the gauge of temperature of a cooler, Ohm / With 275 – 375 / 80
Resistance of the gauge of turns/vmt, Ohm 450 – 1000
Resistance of a heater of a ljambda-probe, Ohm 1 – 5
Atomizers
Pressure of injection of fuel
New atomizers, bar 190 – 200
Deterioration limit, bar 170
Resistance
The gauge of turns of the engine between contacts 1 and 2, a clod 1.0 – 1.5
The switch of a pedal of a brake/stoplight or coupling pedal, Ohm
The pedal is pressed It is opened
The pedal is not pressed less 10
The gauge of moving of a needle (at an atomizer of 3rd cylinder), the Ohm 80 – 120
Pressure of pressurisation турбокомпрессора the diesel engine
Release models till 02.94
At movement on 3 transfer with a speed of 40 km/hour completely squeeze out gas. When speed will reach 80 km/hour pressure should make 1.50 – 1.65, a bar
Models of release from 03.94
Disconnect e / the magnetic valve of management of pressure. At movement on 3 transfer with turns 1500 in minute completely squeeze out gas. On reaching 3000 rpm pressure should make 1.55 – 1.75, a bar
Efforts of a tightening of carving connections
The moments of an inhaling of fixture are resulted also in the text of the Head and on some иллюстрациях*.

*Выделенные in the text a bold type the inhaling moments are subject to exact observance; the efforts not allocated with a bold type are resulted only roughly
The Hall gauge on a head of cylinders 10 H m
The inlet pipeline to a head of cylinders
Petrol engines 10 Н m
Diesel engines 25 Н m
Final collector on a head of cylinders 25 H m
Connections of collars 40 H m
The oxygen gauge to каталитическому to the converter 50 H m
Other boltovye/flantsevye connections 25 H m
Reception pipe to a final collector / турбокомпрессору (бенз.) 40 H m
Reception pipe to a final collector / турбокомпрессору (diesel engine) 25 H m
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