VESPA GTS 250 I.E., Workshop Manual

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Specification Desc./Quantity
11 Electric fan starter
Circuit leak test
Install the appropriate tool for fuel pressure control
with the pipe fitted with the pressure gauge on the
delivery pipe..
Check during regular functioning by placing the
appropriate tool between the pump and the injec-
tor.
With the battery voltage> 12 V check that the fuel
pressure is 2.5 BAR and that the input current is
1.4 to 1.8 A
With the battery voltage > 12 V, check the capacity
of the pump flow rate by disconnecting from the
injector the pipe equipped with the pressure gauge
of the appropriate tool. Make a graded burette
available with a flow rate of approximately 1 L. Ro-
tate the pump using the active diagnosis of the
palm top computer. Using a pair of long flat needle-
nose pliers, choke the fuel pipe making the pres-
sure stabilise at approx. 2.5 BAR. Check that, in
fifteen seconds, the pump has a flow rate of
around 110 cm³.
Specific tooling
020480Y Petrol pressure check set
Injection
Vespa GTS 250 I.E.
INJEC - 24