Passat Syncro Wagon V6-2.8L (ATQ) (2000)
-
Unscrew fuel rail from intake manifold (arrows).
-
Disconnect vacuum hose from fuel pressure regulator.
-
Lift fuel rail with fuel injectors off intake manifold and support it.
-
Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
Checking Proper Seal
-
Switch ignition on.
Vehicles with engine code AHA
-
Bridge sockets 1 + 4 of test box with the respective adapter cables.
Fuel Pump (FP) must run.
Vehicles with engine code ATQ
-
Bridge sockets 62 + 65 of test box with the respective adapter cables.
Fuel Pump (FP) must run.
Continuation for all vehicles
-
Check proper seal of fuel injectors (visual inspection). With Fuel Pump (FP) running, only 1 to 2 drops per minute should escape from each valve.
-
Disconnect connection between test box sockets.
-
Switch ignition off.
If fuel loss is greater:
-
Replace malfunctioning fuel injector, item 7 .
Note the following when installing the fuel injectors:
-
Replace O-rings on all fuel injectors and wet them slightly with clean motor oil.
-
Insert fuel injectors into fuel rail perpendicular and in the right position, and secure them with retaining clips.
-
Position fuel rail on intake manifold using secured fuel injectors and apply uniform pressure to press it in.
-
Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
-
Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking Injection Quantity