I have a 1989 ford probe. Non GT 2.2 and when I start my car. It idles alright for a little while. Untill it gets war. Then it starts to drop and eventually will start bogging down and staul. That also happends everytime I stop at a stop light for stop sign. Or stop at all. I checked the idle coverter valve and the air flow tube. But I still dont know what the problem is.