If i were you i'd go to the junk yard and buy a new throttle body.. There pretty cheap esp. on Ebay. It's not too hard to take off, there are only 4 screws that hold it in.. Just clean it out with carb cleaner and polish the butterfly up with a clean cloth or maybe a dremel if you have one, they're very handy by the way, for cleaning purposes. You might also want to consider changing your TPS(black box facing the front) If you still have the one from stock it's probably brittle on the inside...