Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
2.1. General information
2.2. Predvaritlny checks
2.3. Mekhanichsky part (petrol engines 2,0l)
2.4. Lubrication system
2.5. Cooling system
2.6. System of injection
2.6.1. Removal and installation of a turbocharger
2.6.2. Removal and installation of the vacuum block of a turbocharger
2.6.3. Adjustment of the vacuum block of a turbocharger (the turbocharger is removed)
2.6.4. The general instructions on self-diagnostics of system of injection
2.6.5. Decrease in high pressure of fuel
2.6.6. Removal and installation of a flowmeter of air
2.6.7. Removal and installation of an inlet collector with a fuel stage
2.6.8. Removal and installation of a fuel stage (Rail)
2.6.9. Removal and installation of nozzles
2.6.10. Check of pressure of fuel and residual pressure in front of the pump of high pressure
2.6.11. Check of residual pressure
2.6.12. Removal and installation of the pump of high pressure
2.6.13. Replacement of the control unit of the engine
2.6.14. Removal and installation a lambda probe in front of the catalyst
2.6.15. Removal and installation a lambda probe after the catalyst
2.6.16. The fuel tank (front-wheel cars – all models with MPI engines and 2,0 l of FSI)
2.6.17. Pumping of fuel from a tank
2.6.18. Removal and installation of the fuel tank with hinged details
2.6.19. Electric check of the fuel pump
2.6.20. Check of amount of the fuel given by the fuel pump (cars from the 4th the cylinder engine with a free admission)
2.6.21. Check of amount of the fuel given by the fuel pump (atomobil with the engine of 1,8 l Turbo)
2.6.22. Check of amount of the fuel given by the fuel pump (atomobil from the 4th the cylinder FSI engine)
2.6.23. Check of amount of the fuel given by the fuel pump (cars from 6 the cylinder MPI engine)
2.6.24. Removal and installation of knot of supply of fuel
2.6.25. Fuel tank (all-wheel drive cars till 10:04)
2.6.26. Pumping of fuel from a tank
2.6.27. Removal and installation of knot of a pedal of an accelerator with sensors of provision of a pedal
2.7. System of production of the fulfilled gases
2.8. Mechanical part (petrol engines 3,0; 3,2 l)
2.9. Mechanical part (petrol engines of 4,2 l)
2.10. Mechanical part (diesel engines of 2,0 l)
2.11. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 







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2.6.5. Decrease in high pressure of fuel

Fig. 2.228. Shtekerny socket of the valve of the regulator of pressure of fuel


Remove the shtekerny socket 2 by means of the adjusting tool from the valve of the regulator of pressure of fuel (fig. 2.228).
Leave the engine to idle прибл. during 10 pages.

NOTE
By means of removal of the shtekerny socket from the fuel pressure regulator valve idling fuel pressure прибл. from 50 bars decreases прибл. to 6 bars.

Pressure drop of fuel can be observed if the diagnostic tester is connected and the engine control unit is chosen. Then by means of the "Consider the Block of the Measured Sizes" function to choose group of indication 140.
In the field of indication 3 the fuel pressure (the current value) will be displayed.
Switch off ignition.
After decrease in high pressure it is possible to open system of high pressure, for this purpose it is necessary to wrap up pure rags a junction to dump the residual pressure in fuel system making прибл. 7 bars. Collect the following fuel.

NOTE
If not to disconnect the highway of high pressure immediately, pressure of fuel can increase a little again.

Connect a diagnostic tester and create in the Conducted Search of Malfunctions mode a readiness code in the engine control unit.


2.6.4. The general instructions on self-diagnostics of system of injection

2.6.6. Removal and installation of a flowmeter of air