There are numerous parameters that control Idle vs ECT. Without knowing your vehicle, OS, or any thing specific about your set-up..its all a guess.
I only offer general advice about Idle Tuning..but your problem has come up dozens if not hundreds of times.
Check out this Idle Tutorial..it may or may not help you:
http://forum.efilive.com/showthread....ips-amp-Tricks
My only advice is to resist taking shortcuts..I.E., well its only warm starts..that does not apply to me. Idle must be done in an exact way to be successful..
Good luck..