1993 Accord-problem when first started in the AM

Car has 190,000 miles--runs fine when warm--however--when stone cold (in the
AM, been sitting all night-location Central Florida so it is not freezing
cold) and first started in the AM it makes a "wheezing" or "sighing" sound
and lacks power--these symptoms persist until it warms up and then it is
"good for the day"--a "mechanic" in a "shop" wants to replace the "throttle"
for $500 (this car is fuel injected BTW)--a friend suggested that it may be
the idle air control valve and maybe some cleaning of the air intake and
throttle blades would help--any ideas or similar experiences?

TIA,

Ben III
Lakeland, FL