Open Fuel Injectors, Checking: Procedure

WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

-- Erase the DTC memory entry with the Vehicle Diagnostic Tester.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Clean all connections, for example with commercially available detergent, before removing.

NOTE:

Maintain clean working conditions. Contamination must not enter the fuel system.

Check one cylinder after another.

-- Dry all cleaned components.

Begin with the cylinder 1.

-- Remove the noise insulation.

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-- Disconnect the return line connections on the fuel injectors, to do so push the releases upward in direction of -arrows-.

-- Connect the clean adapter that has been cleaned out using compressed air to the return connection on the fuel injector that is being checked.

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-- A vacuum pressure of -500 mbar (-7.25 psi) is applied using the :VAS6213 .

Fuel injectors are OK when the pressure remains constant for about 30 seconds.

If the fuel injectors are faulty, the pressure will drop to 0 bar again within 2 to 3 seconds.

Repeat the test if necessary. Watch the :VAS6213 for a loss of pressure.

-- Replace any faulty fuel injectors. Refer to FUEL INJECTORS, REMOVING AND INSTALLING .

-- Install the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .