IAC CHANGED AND STILL NOT WORKIN

going to your other post, a vacuum leak will cause a erratic idle. it does not mean the iac is bad just that the iac cannot get the idle into specs for some reason. let a shop at least check it for you to verify. Roy

If you have a misfire, you will never get the car to run correctly and it may even set IAC codes, so fix the misfire problem first. This may solve the IAC problem.