VESPA 633844 IT, Service Manual

Page: 187 / 308

With injector disconnected and the injector load
remote control disconnected, check the continuity
of the Black-Green cable between the injector con-
nector and remote control base.
Inspecting the injector hydraulics
To carry out the injector check, remove the intake
manifold by removing the three clamping screws
at the head and the clip connecting the control unit
to the manifold.
Install the appropriate tool for checking fuel pres-
sure and position the manifold over a container
graduated by at least 100 cm³. Connect the injec-
tor with the cable making up part of the supply for
the injection tester. Connect the clamps of the ca-
ble to an auxiliary battery. Activate the fuel pump
with the active diagnosis. Check that, in fifteen
seconds, approximately 40 cc of fuel is dispensed
with a regulation pressure of approximately 2.5
BAR.
Specific tooling
020480Y Petrol pressure check set
Vespa GTV 250 i.e.
Injection
INJEC - 27