Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Disconnect connectors from injectors.
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Remove fuel rail complete.
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Pull vacuum hose from fuel pressure regulator.
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Lift fuel rail with injectors off intake manifold and support it.
Checking for leaks
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Initiate output Diagnostic Test Mode (DTM (the fuel pump must run). See: Computers and Control Systems/Testing and Inspection/Scan Tool
Testing and Procedures/Output Diagnostic Test Mode (DTM) (Function 03)
NOTE: This work sequence allows the fuel pump to run when the engine is not running.
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Check injector for leaks (visual check). Only 1 to 2 drops per minute must emit from each valve when fuel pump is running.
If the fuel loss is greater:
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Switch off ignition.
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Replace malfunctioning injector, item 10.
Pay attention to the following when installing the injector:
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Replace O-rings on all injectors and lightly moisten with clean engine oil.
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Insert injectors vertically and in the correct position into the fuel rail and secure with retaining clips.
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Fit fuel rail with secured injectors onto intake manifold and press in evenly.
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Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory, checking and erasing DTC memory. See: Computers and
Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
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Read-out the readiness code. If the DTC memory has been erased or the engine control module was disconnected from permanent positive, the
readiness code must be generated again. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking injected quantity
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Insert injector to be checked in a measuring glass of tester for injected quantity V.A.G 1602.