Idling problem, hv done searches but no result found

[dc292177917]

hi mates, my CRX with B16A2 idles a bit high (around 1500rpm) when cold.
the problem is it doesn't go down even hv been driven normally for 15mins,
anyway the temperature pin just won't raise.
i m pretty sure there's nothing wrong with the TPC,
becoz when it's warmed up it idles at 600-700rpm which is pretty normal i reckon.
the thing is it's taking far too long to get warmed up.
i hv done some researches and most likely there are issues with IACV or FITV,
just i don't know where are they located and how to get it done :S
apart from IACV and FITV, what might cause the problem?
any answers will be appreciated

problem fixed, it's thermostat releated
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