So sorry to post late, i didn't recieved notify e-mail yet.
Idle speed is very normal.
But after search for awhile and nothing to loose, i decided to clean idle speed control at local shop.
The outcome is that very dirty (but idle fine).
And i hope the problem gone.

Another unexpected gain is noise.
There is a noise at left a pillar that no one known the cause.
It comes usually at 1600 rpm, always not less or more than this.
When the idle speed control is cleaned , the sound gone.