Passat V6-2.8L (ATQ) (2004)
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Fuel pressure must be OK, check. fuel pressure regulator and retaining pressure, checking. See: Fuel Pressure Regulator/Testing and Inspection
WARNING: Fuel system is under pressure. Before opening system, place rags around the connection point. Then release pressure by
carefully loosening connection.
Test sequence
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First, remove intake hose between Mass Air Flow (MAF) sensor and intake air scoop.
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Pull connectors -1- off connection -2- of all fuel injectors.
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Unscrew fuel rail from intake manifold (arrows).
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Disconnect vacuum hose from fuel pressure regulator.
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Lift fuel rail with fuel injectors off intake manifold and support it.
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Connect test box to control module wiring harness. connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
Checking for proper seal
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Switch ignition on.
Vehicles with engine code AHA
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Bridge sockets 1 + 4 of test box with the respective adapter cables.
Fuel Pump (FP) must run.
Vehicles with engine code ATQ
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Bridge sockets 62 + 65 of test box with the respective adapter cables.