Inspecting The Injector Hydraulics - VESPA GTS 250 I.E. Workshop Manual

Vespa GTS 250 I.E.
11

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 the fuel pressure
check and position the manifold over a container
graduated by at least 100 cc. Connect the injector
with the cable making up part of the supply for the
injection tester. Connect the clamps of the cable
to an auxiliary battery. Activate the fuel pump with
the active diagnosis. Check that, in fifteen sec-
onds, approximately 40 cc of fuel is dispensed with
a regulation pressure of approximately 2.5 BAR.
Specific tooling
020480Y Petrol pressure check set
Proceed with the injector seal test.
Dry the injector outlet with a blast of compressed
air. Activate the fuel pump. Wait for one minute,
making sure there are no leaks coming from the
injector. Slight oozing is normal.
Value limit = 1 drop per minute
Specification
Electric fan starter
Injection
Desc./Quantity
INJEC - 33