Open Fuel Injectors, Checking

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

Special Tools And Workshop Equipment Required

Vehicle Diagnostic Tester
Hand Vacuum Pump:VAS6213
Adapter C6 from the Return Flow Meter:VAS6684

CAUTION:

This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.

Mandatory Replacement Parts

O-ring - Return Fuel Line

Procedure

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

-- Remove the engine cover. Refer to ENGINE COVER .

CAUTION:

Danger of malfunction caused by debris.

-- Clean all return line connections, (for example with commercially available detergent), before removing.

-- Dry all of the cleaned components.

NOTE:

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

Check one cylinder after another.

Begin with the cylinder 1.

-- Remove the noise insulation.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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, then 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 .