Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
- Search of malfunctions
   Sequence of search of malfunctions
   Visual check
   Cause of failure — electrosystem
   Cause of failure — ignition system
   Cause of failure — system of supply of fuel
+ Specifications

Sequence of search of malfunctions

Whether the starter works

If the starter does not join or turned badly, read further the section «A cause of failure — electrosystem». If it, on the contrary, surely scrolled the engine, it is necessary to answer in turn the following questions further to narrow a search circle.

Whether give a spark plug spark?

To disconnect a wire tip 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 "lighter" 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 clarification of the following question. If is not present, read further the section «A cause of failure — ignition system».

Whether fuel in injection system arrives?

To disconnect submitting топливопровод from the union in a motor compartment. Carefully: models to the 5-cylinder engine can have an emission of rather large amount of fuel under a high pressure. Therefore when weakening connection 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 the section Cause of failure — system of supply 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 supply of fuel of the engine in capacity of 66 kW, on the bottom illustration the 6-cylinder engine) is represented.