Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation



Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
- Search of malfunctions
   Sequence of search of malfunctions
   Visual check
   Cause of a failure — electrosystem
   Cause of a failure — ignition system
   Cause of a failure — system of giving of fuel
+ Specifications



Sequence of search of malfunctions

Whether the starter works

If the starter does not join or turned badly, read further section «the Cause of a failure — electrosystem». If it, on the contrary, has confidently scrolled the engine, it is necessary to answer by turns following questions further to narrow a search circle.

Whether give a spark plug spark?

To disconnect a tip of a wire from one of spark plugs, to turn out a candle, to insert into a tip. Now to connect a candle by means of an auxiliary cable for «прикуривателя» to the block of cylinders (on an illustration the auxiliary cable is not represented for the best presentation). To ask the assistant to turn a starter. Do not touch a high-voltage wire and a spark plug – it is dangerous! Whether sparks are visible? If yes, pass to finding-out of a following question. If is not present, read further section «the Cause of a failure — ignition system».

Whether fuel in injection system arrives?

To disconnect submitting топливопровод from the union in a motor compartment. Cautiously: models to the 5-cylinder engine can have an emission concerning a fuel considerable quantity under a high pressure. Therefore at connection easing put on the union a thick rag. It is possible to extend submitting топливопровод by means of a hose and to lower its end in any capacity. Ask the assistant to turn a starter shortly.

If gasoline moves, the fuel pump should work. If is not present, read further section the Cause of a failure — system of giving of fuel. If gasoline moves, as a source of malfunctions there is only an injection system. Or the fuel pump though works, but does not give the necessary pressure.

(The top illustration shows check of system of giving of fuel of the engine by capacity of 66 kw, on the bottom illustration the 6-cylinder engine) is represented.