_My car just started doing this idling thing. When I'm at a complete stop at a stop light, the car idles rougher than normal. What are some causes of this and how do I fix it. Could this just be something in the intake or some sort of clogged filter possibly. I'm not the smartest guy when it comes to automotive things but I am usually pretty handy at fixing it myself. The begat gave them ideas that what it could possibly be I could start from there.