high idle speed

[yeding]

I have a 2000 prism and just changed the starter today (I had the "click" problem for several weeks already). when I changed the starter, I also cleaned up the throttle valve a little bit. everything works fine now. However, I just noticed that my idle speed is around 1100 rpm. is that normal for a prism? I thought it should be less the 900 rpm. but when I was driving it and stop at the red light. the idle speed is around 650 rpm which I thought is normal. did u guys have this problem before? do I need to adjust the idle speed? any suggestion will be appreciated, thx