Ok guys need some opinions here..

Got a 90 eclipse gst..every morning i turn it on it revs up to 1800-2000 rpms.i know its usually normal since its not at normal temps but the problem is that it stays like that for a while..every stop i do it goes up and stays like that..its gone down to normal once in a while but 90% of the time its idling very high..throttle cable is not sticking also tried adjusting the biss screw doesnt change anything.ive been through alot of forums but havent really found anything out..

Has new alternator
New battery
New plugs and wires
Flushed out coolant system
No boost leaks or exhaust leaks anywhere(just fixed all that)
Has NO thermostat.

Need some tips on where to look this thing is getting frustrating anything will help guys thanks

Sounds like a fiav issue. Are there coolant hoses running to the throttle body? And mods to the car?

Yes they are..

20g turbo
External wastegate
Fmic
Everything else is stock

Anybody got a 90 throttle body with sensors?

Try disabling the fiav. Remove the plate, and close the valve manually. There is a write up on it.

http://www.dsmtuners.com/threads/free-fiav-block.391977/

Problem fixed..the thottle body was replaced and now has a perfect idle