very high idle at cold start on 1992 Honda Accord

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i have a 1992 honda accord with 324000 miles on it, i keep it in the garage every night, each morning it starts at a very high idle around 1500 rpm, then gradually slows, it is a five speed. Do you have any ideas what the problem is?
(2) Answers
it idles high at first to warm the engne faster as it gets wamer the idle lowers ,,,,, i thinks its called a iacv
theres absolutly no problem there, older hondas do this, it idles high at cold start to help warm up the engine, gradually goes down, every honda ive ever had did that, and yes it is the IACV Idle Air Control Valve, and its clearly doing its job, no worries:)