Contents - Volkspage

4B.6 Fuel system: multi-point injection models
5.36a Slacken and withdraw the fuel rail
retaining screws (art-owed) . . .
5.36b . . . then carefully lift the fuel rail
away from the inlet manifold,
together with the injectors
5.37a Unclip both halves of the plastic
shielding from the injector body
5.37b Remove the insulating shroud 5.37c Unplug the wiring harness connector 5.37d Extract the retaining clip
5.37e Prise out the injector
5.37f Fuel rail, injector and fuel pressure
regulator assembly (No 1 injector removed)
1 Fuel pressure regulator 2 Fuel rail
3 Fuel injectors 4 Fuel pressure test point
5.37g Injector O-rings (arrowed)
seals as they emerge from the manifold, if
they work loose (see illustrations).
37 To remove individual injectors from the
fuel rail, proceed as follows (see illustrations):
a) Unclip both halves of the plastic shielding
from the injector body.
b) Remove the insulating shroud.
c) Unplug the wiring harness connector.
d) Extract the retaining clip.
e) Prise out the injector.
38 If required, remove the fuel pressure
regulator, referring to the relevant sub-Section
for guidance.
39 Check the electrical resistance of the
injectors using a multimeter connected across
the injector terminals - compare the results
with the Specifications.
40 Moisten the injector O-rings with clean
engine oil, then refit the injectors to the fuel
rail, ensuring that the O-ring seals are
correctly seated and that the retaining clips
are firmly in place.
Refitting
41 Refit the injectors and fuel rail by following
the removal procedure in reverse, noting the
following points:
a) Renew the injector O-ring seals if they
appear worn or damaged.
b) Ensure that the injector retaining clips are
securely seated.
c) Check that the fuel supply and return
hoses are reconnected correctly - refer to
the colour coding described
in “Removal”.
d) Check that all vacuum and electrical
connections are remade correctly and
securely.
e) On completion, check exhaustively for
fuel leaks before bringing the vehicle back
in to service.
Fuel pressure regulator
A
Warning: Observe the
precautions in Section 1 before
! working on the fuel system.
ideally this operation should be
carried out when the engine is cold.
Removal
42 Disconnect the battery negative cable and
position it away from the terminal.
43 Refer to Section 8 and depressurise the
fuel system.