audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 3335 > < Fuel Delivery Rate, Checking|Page 3332
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Fuel Pressure: Testing and Inspection
With Manufacturer's Scan Tool

System Pressure, Fuel Pressure Regulator And Holding Pressure, Checking

Special tools and equipment

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VAG 1318

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VAG 1318/7

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VAG 1318/17 (2x)

NOTE:  The fuel pressure regulator regulates the fuel pressure according to the intake manifold pressure. This ensures that the drop in pressure at the
injectors remains the same throughout all engine speed and engine load ranges.

Requirements for test:

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Fuel pump relay OK.

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Fuel pump OK.

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Fuel filter OK

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Battery voltage not less than 12.7 V

WARNING:  Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully
loosening the connection.

Testing system pressure

With Manufacturer's Scan Tool|Page 3335 > < Fuel Delivery Rate, Checking|Page 3332