Evaporative Emission Purge Control Valve Inspection (California Type Only) - Honda 1998 VT750C Service Manual

FUEL SYSTEM
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Sustained operation at an altitude lower than 1,500
m
(5,000 feet) with the carburetors adjusted for high
altitude may cause the engine to idle roughly and
engine may stall in traffic and may cause engine
damage due to overheating.
When the vehicle is to be operated continuously
below 1,500 m (5,000 feet), turn each pilot screw to
the specification below, its original position.
LOW ALTITUDE SETTING: 1/2 turn out from high
altitude setting
Adjust the idle speed to 1,000 ± 100 rpm with the
throttle stop screw.
Drive new pilot screw plugs into the pilot screw
bores (page 5-23).
Be sure to make these adjustments at low altitude.
Remove the Vehicle Emission Control Update Label
that was attached to the inside of the left side cover
after adjusting for the low altitude.
EVAPORATIVE EMISSION
,'PURGE CONTROL VALVE INSPECTION
•
(CALIFORNIA TYPE ONLY)
VACUUM HOSE ROUTING DIAGRAM
ENGINE FAMILY I I
EVAPORATIVE FAMILY I I
CALIFORNIA VEHICLE
The evaporative
emission purge
control valve should
be inspected if hot
restan is difficult.
The EVAP PURGE
CONTROL VALVE
is located under the
fuel tank.
5-28
Check the fuel tank, Evaporative Emission Purge
Control Valve (EVAP PURGE CONTROL VALVE), and
evaporative emission canister hoses to be sure they
are not kinked and are securely connected. Replace
any hose that shows signs of damage or
deterioration.
Disconnect the EVAP PURGE CONTROL VALVE
hoses from their connections and remove the EVAP
PURGE CONTROL VALVE from its mount. Refer to
the routing label on the inside of the left side cover
for hose connections.
Connect a vacuum pump to the 8 mm (0.31 in) I.D.
hose No.5 that goes to the 3-way joint. Apply the
specified vacuum to the EVAP PURGE CONTROL
VALVE.
SPECIFIED VACUUM: 250 mm
(9.8
in) Hg
FUEl TAN< EVAP CAV CONTROL VALVE
EVAP CANISTER
MHA-770