audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 1167 > < With Generic Scan Tool|Page 1164
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Fuel Pressure: Testing and Inspection
With Manufacturer's Scan Tool

System Pressure, Fuel Pressure Regulator And Residual Pressure, Checking

NOTE:

-

The fuel pressure regulator is located in the fuel filter underneath the tank.

-

Fuel pressure regulator regulates fuel pressure according to intake manifold pressure. This ensures that the pressure drop at the fuel injectors
remains the same for each speed and load range of the engine.

Special tools and workshop equipment required

-

V.A.G 1318 Pressure gauge

-

V.A.G 1318/6 Adapter

-

V.A.G 1318/7 Adapter

Requirements

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Fuel pump relay OK.

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Fuel pump OK; checking:

-

Fuel filter OK

-

Battery voltage at least 12.7 V

-

Vehicles with automatic transmission: Selector lever in position P or N.

Checking system pressure

-

Remove engine cover (arrows).

-

Open fuel filler flap and briefly open the fuel tank filler cap (to release pressure).

-

Remove engine cover.

Vehicles up to 06.03

WARNING:  The fuel system is pressurized. Before opening the system place a cloth around the connection. Then release pressure by carefully
loosening the connection.

With Manufacturer's Scan Tool|Page 1167 > < With Generic Scan Tool|Page 1164