my idle has been 100 rpms higher then normal for a while but the last few days its been crazy, it would idel at 1000 rpms in nuetral fully warmed up and accasionaly when its about half warm it will lope from 400 rpms to about 850 rapidly when stopped in gear i was thinking IAC valave but ti isnt very connsistent, what else controlse the idel

 

The IAC is the obvious answer why not just replace it? $47 at autozone. While your at it clean the throttle body..

 

cel? maybe check for vacuum leak and clean maf sensor. but i think its iac

 

no cel, i clean the mass air the other day and i check for vac leaks and coouldent find any