audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 7136 > < Fuel Pressure|Specifications
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Fuel Pressure: Testing and Inspection
With Manufacturer's Scan Tool

Fuel Pressure Regulator And Holding Pressure, Checking

NOTE:  The fuel pressure regulator regulates the fuel pressure according to the intake manifold pressure. The pressure drop at the injectors remains
constant for each engine speed and load range.

Special tools and equipment

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VAG1318 with VAG1318/6 and VAG1318/7

Test requirements:

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Fuel pump relay OK; See: Fuel Pump Relay/Testing and Inspection

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Fuel pump OK

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Fuel filter OK

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Battery voltage at least 12.7 V

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

Test sequence

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Remove rear engine cover (arrows).

Checking system pressure

WARNING:  The fuel system is under pressure! Place a cloth around the connection point before opening the system. Then carefully loosening
the connection to relieve pressure.

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Briefly open fuel tank filler cap (to release pressure).

With Manufacturer's Scan Tool|Page 7136 > < Fuel Pressure|Specifications