VESPA GTS Super 125 i.e. Service Station Manual page 160

Injection
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 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, within fifteen
seconds, approximately 40 cm³ of fuel is dis-
pensed with an adjustment pressure of approxi-
mately 2.5 BAR.
Specific tooling
020480Y Petrol pressure check kit
INJEC - 160
Vespa GTS Super 125 i.e.