hey ive asked around and got quite a few different answers, but i just wanna know exactly what this is and if anyone knows how to fix it. 50 percent of the time my car idles normal but sometimes after ive raced someone or driven it for a while, when i stop it idles back and forth between 500rpm and 1500 rpm back and forth back and forth and it just gets annoying. does anyone know what im talking about here?

 

Type in "idle" in the search function and you'll get like 5 pages of info just in the Prelude forum. Somehow I don't think you're the 1st person this has happened to....