Audi A4

since 1994 of release

Repair and car operation

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
- Injection system
   + System of injection of Motronic
   - System of injection of MPI and MPFI
      Additional functions
      Knots of system of injection
      Adjustment with the help a lambda probe
      Violations in work and self-diagnostics
      Visual control
      Check of knots
      Dismantle of separate details
      Butterfly valve cable
      Inlet collector
      Idling adjustment
      Check of exhaust gases
      The help at malfunctions
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

The help at malfunctions

System of injection of MPI/MPFI

Its reasons
Your help
A. The cold engine is not got or got badly 1. Defective safety lock 13, 21, 25, 27 or 28
2. The relay of the fuel pump is faulty
3. The fuel pump does not submit fuel or submits insufficient quantity
4. The regulator of pressure of fuel is faulty
5. The valve of stabilization of idling is faulty
6. The control unit is faulty
7. The signal from the sensor about number of turns of the engine does not arrive
8. In the engine additional air arrives
Check, if it is necessary, replace
Check availability of gasoline in a fuel tank
Check the fuel pump, measure amount of arriving fuel
Measure pressure in a workshop
Check in a workshop
Check a wire on all length
Check all hoses
Century. The heated-up engine is not got or got badly 1. Defect in a vacuum hose to a regulator of pressure of fuel
2. See. And 1–4, 6 and 7
3. Injection valves are not tight
4. The sensor of temperature of cooling liquid is faulty
Check a hose

Check valves
Check the sensor

S.Dvigatel is got, but soon again глохнет 1. See. And 1 and 5
2. See. In 1
3. The size WITH does not correspond to norm
4. Defect in a measuring instrument of weight of air (MPI) or in the sensor of temperature of soaked-up air or in the pressure sensor in an inlet collector (MPFI)
5. The butterfly valve potentiometer is faulty

Check in a workshop injection


D. The cold engine shivers idling See. And 5
Е. The heated-up engine shivers idling 1. See. And 4 and 5
2. See. With 3
F. Too high turns at the heated-up engine idling See. And 5
G. The engine works with interruptions 1. The fuel filter got littered
2. See. And 3 and 5
3. See. In 3
4. See. With 3 and 4
Replace the filter
N.Dvigatel works with interruptions, is disconnected Non-uniform supply of fuel by the fuel pump Measure amount of submitted fuel
I. Insufficient engine capacity 1. See. And 3,4 and 8
2. See. With 3 and 5
3. The butterfly valve does not pass to the provision of full gas
Adjust a butterfly valve cable

J. The engine gives return flashes in an inlet collector

1. See. And 4
2. See. With 3
K.Slishkom high fuel consumption 1. See. In 4
2. See. With 3