Throttle
The throttle is a round metal "butterfly" blade that resides inside the round "bore" of the throttle body and controls the amount of air that is allowed to enter a gasoline engine. The opening/closing of this blade is controlled by a cable attached to the throttle pedal or by a computer-controlled electronic throttle motor.
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After coming to a stop rpm will stay at 1800. then slowly drop down to normal(700). with no check engine light
Thanks dandd for your replies. i am planning on taking these replies w/me when i have the throttle checked. how mch...