audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Fuel Pressure and Residual Pressure Before High Pressure Pump, Checking > < Delivery Rate of Fuel Pump, Checking|Page 5426
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Connect pressure gauge V.A.G 1318 to fuel line using adapter V.A.G 1318/11 and V.A.G 1318/12 .

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Connect extension hose - arrow - to pressure gauge and hold it in a measuring container.

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Open shut-off valve of pressure gauge. The lever points in direction of flow.

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Generate pressure in fuel system by pressing switch of remote control and slowly closing shut-off valve of the pressure gauge.
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Specification: 4 bar positive pressure.

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From this point on do not move position of shut-off valve.

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Empty measuring container.

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Press switch on remote control for 15 seconds.

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Compare quantity of fuel delivered with minimum delivery rate in diagram (cu.cm /15s).

NOTE:  Voltage at fuel pump with engine stopped and pump running is approx. 2 volts less than battery voltage.

If minimum delivery quantity is not obtained, the following malfunctions may be present:

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Fuel lines pinched.

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Fuel filter clogged.

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Fuel pump faulty.
Installation is in reverse order of removal.

Torque specifications

Fuel line to fuel rail

22 Nm

Fuel Pressure and Residual Pressure Before High Pressure Pump, Checking > < Delivery Rate of Fuel Pump, Checking|Page 5426