S4 V8-4.2L (BHF) (2004)
-
Switch ignition on.
-
Fuel pump should run
-
Activate remote control V.A.G 1348/3A for 30 seconds.
-
Perform measurements on all injectors.
-
Once all four injectors have been actuated, place measuring glasses on a level surface.
Specification for each injector: 105 to 125 ml
If specified result is not attained for all injectors:
-
Check fuel pressure
If specified results are not attained for one injector:
-
Replace relevant injector.
NOTE: When checking the injection quantity, also check the spray pattern. The spray pattern should be the same for all the injectors.
Installation of the fuel rail together with injectors is performed in the reverse sequence. The following points should be noted when installing:
-
Replace the O-rings at all opened connections. (when replacing the front O-ring, make sure the plastic cap is not removed from the injector head.
The O-ring must be pulled off over the plastic cap).
-
Coat O-rings with clean engine oil.
-
Check to make sure that the retainer clamps are properly seated.
-
When screwing fuel rail to intake manifold, tighten to: 10 Nm
-
Bleed air from fuel system