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