idle gone mad, help!

my idles going beserk. ok where should it be to start. also when i run it for a while, like on the highway with th ac on, when i get off the throttle and pop it into nuetral, it sometimes stays at about 2000 rpm. when i turn the ac off, it goes alllllll the way doen to regular. then when i turn the ac back on it doesnt even move. ive messed with the idle screw and it seems t have minimal affect after a certain rpm, like 700. but it DOES have a little effect, could my idle screw be screwing up? pun indended
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

Sounds like your IAC is screwing up.

wheres that located, the other side of the plenem?
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

its not the isc is it????

The IAC is on the throttle body.

the lower part? any pics?
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

Yes lower part of the throttle body

dam, ok 3sx call it the isc and its 400 bucks, shit. can it fuck aything else up
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

fuck 3sx and their $400 ISC.

DSMIAC.com is your friend.

thats not giving me a website
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

nvm its dsmisc.com yea ima get that, but first ima try to clean out my exsisting one. if thats not it, then what else could be causing a crazy idle?
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http://www.stealth316.com/2-isc-iac.htm and http://www.dsmisc.com/dsmweb-dw/index.html

I bought my IAC from those guys when mine went back a couple years ago - good guys to work with.

ok i ordered it, from orielys cuz i got the hookup there. my dad told me to check vacum lines, maf, and change the filter, which i did. it seems alil better, but i gotta question.

when i turn the ac on, should the idle get lower or higher????

whats the best place for my idle to be at warm, no ac???
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

When you turn the AC on the idle should increase.

thats what i said. ok so then its gotta be the iac
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