great writeup on rough idle tips...heres the link

[killer5.0]

dont know if you guys have seen it b4 or not but here it is.



Ford Mustang IAC IAB - Solving your idle problems

 

[HISSIN50]

FYI, it's been posted many times. It's still a useful refresher for the newer people......

 

[SVT32VDOHC]

That link is funny, because I've had rough idle and cleaned the IAC before and it didn't do a damn thing. lol

 

[liljoe07]

Yes, all that article does is assume that the IAC is faulty or dirty. But there is tons of other things that can cause the same issue.