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

FUEL SYSTEM
VACUUM PUMP
TO OPEN AIR
EVAPORATIVE EMISSION
CARBURETOR AIR VENT
l~"'-"'-
CONTROL VALVE
TOAIR
JOINT PIPE
No.6 HOSE
TO
EVAPORATIVE
EMISSION
CANISTER /
No.4 HOSE
TO RIGHT
CARBURETOR
BODY No.10 HOUSE
Disconnect the Evaporative Emission Carburetor Air
Vent Control Valve (EVAP CAV CONTROL VALVE)
hoses from their connections and remove the EVAP
CAV CONTROL VALVE from its mount. Refer to the
routing label on left side cover for hose connections.
Connect a vacuum pump to the No.10 hose that goes
to the right carburetor body.
Apply the specified vacuum to the EVAP CAV
CONTROL VALVE.
EVAPORATIVE EMISSION CARBURETOR
AIR VENT CONTROL VALVE INSPECTION
(CALIFORNIA TYPE ONLY)
SPECIFIED VACUUM: 250 mm (9.S in) Hg
CAUTION:
The specified vacuum should be maintained.
Replace the EVAP CAV CONTROL VALVE jf vacuum
is not maintained.
TOOL:
Vacuum/pressure pump
Vacuum pump
A937-04l-XXXXX or
ST-AH-260-MC7
(U.S.A. only)
\"
VACUUM PUMP
To prevent damage to the evaporative emission
carburetor air vent control valve, do not use high
air pressure sources. Use a hand operated air pump
only.
Connect the vacuum pump to the air vent port of
the EVAP CAV CONTROL VALVE.
Apply vacuum to the EVAP CAV CONTROL VALVE.
The vacuum should hold steady.
Replace the EVAP CAV CONTROL VALVE ifvacuum
leaks.
TOOL
Vacuum/pressure pump
Vacuum pump
A937-04l-XXXXX or
ST-AH-260-MC7
(U.S.A. only)
\
PRESSURE PUMP
VACUUM PUMP
I
Connect the vacuum pump to the No.10 hose that
goes to the right carburetor body.
Connect the pressure pump to the air vent port of
the EVAP CAV CONTROL VALVE.
While applying the vacuum to the EVAP CAV
CONTROL VALVE No.10 hose that goes to the right
carburetor body, pump air through the EVAP CAV
CONTROL VALVE and out the hose that goes to the
carburetor air joint pipe.
TOOL:
Vacuum/pressure pump
Vacuum pump
Pressure pump
A937-041-XXXXX or
ST-AH-260-MC7
ST-AH-255-MC7
BLOCKED
TUBE
\
PRESSURE PUMP
VACUUM PUMP
I
5-30