IAC Motor

Can anyone give a little background on the IAC motor? i.e. how it works, cost, when it should be replaced, reprecussions if it goes bad while driving, how you know when to replace it (idling), and maybe a few examples of some good buys? thanks

http://www.stealth316.com/2-isc-iac.htm

Answers all your questions...

well then....thank you very much!