Starting Air Valve - Honda Prelude 1993 Service Manual

ldle Control System
Fast ldle Thermo Valve (cont'd)
Starting Air Valve
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F22A'l ongine lS):
NOTE: The tast idle thermo valve is factory adjusted;
it should not be disassembled.
1. Remove the cover of the fast idle thermo valve.
2. Start the engine.
3. Put your finger on the valve seat area and make sure
thst ther€ is 8ir flow with the engine cold {engine
coolant temperature below 86oF, 30oCl and idling.
lf not, replace the tast idle thermo valve and
retest.
't 2 N.m
(1.2 ks-m. I lb-ttl
4. Warm up the engine (the radaator tan comes on).
5. Check that the valve is completely closed. lf not, air
suction can be {elt in the valve seat area.
a It any suction is felt, the valve is leaking.
Check engine coolant level and for air in the en-
gine cooling system (see section 'lO).
It OK, replace the fast idle thermo valve and
recheck.
Description
When cranking the engine, the starting air valve suppliss
additional air to the intake maniJold to ease engine
starting.
TO INTAKE
MANIFOLD
ADDITIONAL
AIR FROM
AIR CLEANER
DIAPHRAGM
Warm up the engine (the radiator fan comes on).
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