Hey my car is idling up and down. It will run ok when you first turn it on but after about a minute or two it will start the idling. I have replaced the iacv and checked all the hoses, coolant is good as well. It will also do it in drive while i have my foot on the break, sometimes it will start to idle up and down then it will stop doing it again. It runs good other than that. Any help would be greatly appreciated. Thanks