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volkswagen Workshop Repair Guides


Passat Sedan V6-3.6L (BLV) (2008)

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Delivery Rate, Checking > Page 2305

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Fuel Pressure: Testing and Inspection
Fuel Pressure Test

Diagnostic Procedures

Fuel Pressure Test

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› fuel line adapter set (V.A.G. 1318/17A). These tools may be substituted with an equivalent aftermarket tool and are also available for rental or

purchase through Volkswagen.

‹› In line Fuel pressure gauge with shutoff valve. (high pressure).

Test conditions

‹› Battery voltage 12.5 V

‹› Function and voltage supply for the Fuel Pump is OK.

‹› Fuel tank at least 1/4 filled.

‹› Ignition switched off.

Test procedure

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Observe safety precautions. Refer to => [ Safety Precautions ] See: Powertrain Management/Computers and Control Systems/Service
Precautions/Safety Precautions

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Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Powertrain Management/Computers and Control
Systems/Service Precautions/Clean Working Conditions

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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.

CAUTION!
Fuel supply line is under high pressure! Wear protective goggles and protective clothing to prevent injuries and contact with skin. Before
removing from hose connection consult the Repair Information for proper procedure.

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Remove high pressure in fuel system. 

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Place a cloth around connection and slowly loosen union nut -  arrow - to reduce fuel pressure.

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Then tighten threaded connection again.

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Fuel Pressure > System Information > System Diagnosis > Delivery Rate, Checking > Page 2305

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