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Volkswagen Workshop Service and Repair Manuals

Fuel Injectors, Leak and Injection Quantity, Checking|Page 3221 > < Fuel Injector|Specifications
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Fuel Injector: Testing and Inspection
Fuel Injectors, Leak and Injection Quantity, Checking

Fuel Injectors, Leak and Injection Quantity, Checking

Special tools, testers and auxiliary items required

‹› Remote Control (V.A.G 1348/3A)

‹› Adapter Cable (V.A.G 1348/3-2)

‹› Injector Rate Tester (V.A.G 1602)

‹› Connector Test Set (V.A.G 1594C)

=> [ Checking for Leaks ] 

=> [ Injection Quantity, Checking ] 

Checking for Leaks

CAUTION!
The fuel system is under pressure! Wear protective goggles and protective clothing to prevent injuries and contact with skin. Before
disconnecting the connection, wrap a cloth around the connection. Then carefully release pressure by disconnecting the connection.

‹› Fuel pressure must be OK, checking, refer to => [ Fuel Pressure Regulator and Residual Pressure, Checking ] See: Fuel Pressure

Regulator/Testing and Inspection.

Procedure

-

Remove the intake manifold. Refer to => [ Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and Repair/Intake
Manifold.

-

Disconnect the connectors from the fuel injectors.

-

Remove the fuel rail completely (fuel supply line remains connected). Refer to => [ Fuel Rail Overview ] See: Fuel Rail/Service and Repair.

-

Remove the rear seat bench.

-

Remove the cover from the fuel delivery unit.

-

First, gently pull on the connector - arrow - without pressing the retainer to make sure it is securely connected. If the connector was not connected
correctly, it could cause a fault.

Fuel Injectors, Leak and Injection Quantity, Checking|Page 3221 > < Fuel Injector|Specifications