A4 V6-3.0L (AVK) (2004)
Fuel Injector: Testing and Inspection
With Manufacturer's Scan Tool
Injection Quantity, Leak Tightness And Spray Pattern Of Injectors, Testing
Special tools and equipment
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VAG 1348/3A with 1348/3-2
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VAG 1594 A
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VAG 1598/31
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VAG 1602
Test requirements
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Fuel pressure OK.
Test sequence
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Remove fuel rail with injectors installed from intake manifold. Do not disconnect fuel hoses.
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Connect test box VAG1598/31 to wiring harness for engine control module. Do not connect engine control module. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's Scan Tool/Scan Tool Connecting and
Initial Checks/Wiring and Component Testing Using VAG1598/31 Test Box
Testing for leaks
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Bridge terminals 1 and 65 at test box using test leads adapter kit VAG 1594 A.
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Switch ignition on.
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Fuel pump should run.
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Check injectors for leaks (visual check). When fuel pump is running, only 1 or 2 drops a minute should escape from each injector.
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If a greater amount of fuel escapes, switch off fuel pump (disconnect cable bridge) and replace faulty injector.