Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Test sequence
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Remove suction 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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Pull vacuum hose off fuel pressure regulator.
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Lift fuel rail with fuel injectors off intake manifold and support it.
Checking Proper Seal
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Perform output Diagnostic Test Mode (DTM); transfer Fuel Pump (FP) must be running. Refer to Scan Tool Testing/Output Diagnostic Test
Mode (DTM) See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Output Diagnostic Test Mode
(DTM) (Function 03)
NOTE: The only purpose of this step is to allow the transfer Fuel Pump (FP) to run with the engine stationary.
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Check proper seal of fuel injectors (visual inspection). With transfer Fuel Pump (FP) running, only 1 to 2 drops per minute should escape from
each valve.
If fuel loss is greater:
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Switch off ignition and replace leaking fuel injector.
NOTE: Always use new sealing rings.
Checking Injection Quantity