Golf GLS L4-2.0L (AZG) (2001)
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Connect test box V.A.G. 1598/31 to control module wiring harness. Engine control module remains disconnected.
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Remove intake manifold upper part.
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Disconnect connector from all injectors.
Engines: AVH, AZG, BEJ
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Remove vacuum hose from fuel pressure regulator
Continue for all engines
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Remove securing bolts on fuel rail.
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Pull hose off air line for air shrouded injectors.
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Lift fuel rail along with injectors off intake manifold and support.
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Bridge test box sockets 1 and 65 using adapter cable from adapter set V.A.G. 1594.
Note: This work sequence allows the fuel pump to run when the engine is not running.
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Switch ignition on.
Checking for leaks
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Check injector for leaks (visual check).
Only 1 to 2 drops per minute must emit from each injector when fuel pump is running
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If fuel loss is greater:
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Switch ignition off and replace leaky injector.
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Erase DTC memory to return learned values to a neutral (default) position, Refer to Interrogating and erasing DTC memory
Note: Always replace O-rings and moisten them with engine clean oil.
Checking quantity injected
Requirements
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Test box V.A.G. 1598/31 still connected and test box sockets 1 and 65 are still bridged using adapter cables from adapter set V.A.G. 1 594.
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Insert injector to be checked in a measuring glass of calibration tester V.A.G. 1602.
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Connect one contact of injector to be tested to engine Ground using adapter cables from V.A.G. 1594.
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Using adapter cables connect second injector contact to remote control V.A.G. 1348/3 with adapter cable V.A.G. 1348/3-2.
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Connect alligator clip to battery (+).
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Switch ignition on. Fuel pump must run.
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Operate remote control V.A.G. 1348/3 for 30 seconds.
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Repeat check on other injectors. Use another (clean and dry) measuring beaker for each.
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After all injectors have been activated, place measuring glasses on a horizontal surface and compare quantity injected.
Specification: 85 to 105 ml per injector
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If the measured values of one or more injectors are above or below the prescribed specifications: