VESPA GTV 250 i.e. 2008 Service Station Manual page 179

Vespa GTV 250 i.e.
With injector disconnected and the injector load
relay disconnected, check the continuity of the
Black-Green cable between the injector connector
and relay 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 specific tool to check the fuel pressure
and position the manifold on a graduated container
of at least 100 cm³. Connect the injector with the
cable that is part of the equipment for the injection
tester. Connect the clamps of the cable to an aux-
iliary battery. Activate the fuel pump with the active
diagnosis. Check that, within fifteen seconds, ap-
proximately 40 cm³ of fuel is dispensed with an
adjustment pressure of approximately 2.5 BAR.
Specific tooling
020480Y Fuel pressure measurement kit
Injection
INJEC - 179