Pair Control Valve Removal/Installation ('02 - '05 Model Only); Pair Check Valve Inspection - Honda Metropolitan CHF50 Service Manual

FUEL SYSTEM
Start the engine and open the throttle slightly to be
certain that air is sucked in through the secondary
air intake ports of the air cleaner housing.
If the air is not drawn in, check the air supply hose
for clogs.
With the engine running, gradually apply vacuum to
the PAIR control valve.
Check that the air intake port stops drawing air, and
that the vacuum does not bleed.
SPECIFIED VACUUM: 450 mm Hg
If air is drawn in, or if the specified vacuum is not
maintained, install a new PAIR control valve.
VACUUM PUMP
VACUUM HOSE
PLUG PAIR CONTROL
VALVE
AIR SUPPLY
HOSE
AIR SUPPLY HOSE
PAIR CONTROL VALVE REMOVAL/
INSTALLATION ('02 - '05 model only)
Remove the air cleaner housing(page 5-6).
Disconnect the vacuum hose, air supply hose and
PAIR control valve.
Route the hoses Install the removed parts in the reverse order of
properly, removal.
PAIR CONTROL VALVE
PAIR CHECK VALVE INSPECTION
Remove the plug maintenance lid (page 3-6).
Remove the bolts and PAIR check valve cover.
COVER
5-23