Hello everyone, i am new here. I have a 2001 mustang gt. I am having problems with my idleing. About a year ago, i had to have the IAC replaced cause my car wouldnt idle at all. Now my car wont idle down. if i just start it and let it idle it will sometimes idle high then go back to normal, and continue to do this. And when i am driving it, say i am doing 3000 rpms and i push in the clutch, it wont idle down, it will just stay at 3000 rpms. can anyone help me please.....