Hello I have a 1997 Cobra. I just cleaned my imrcs and intake manifold. I also installed a pcv filter and oil catch can. I started the car and my idle is high. It idles at about 1500 rpm when I'm coasting. When I come to a stop and am stopped for 5 seconds, the idle drops down to about 900 rpms. I did clean my IAC. It was not like this before. Any help would be greatly appreciated. Thanks!

 

Found the problem. I used the wrong type of hose for the pcv. When the hose heated up it got soft and the vacuum was sucking it closed. DONT USE VINYL HOSE