hey guys, i know this ones probably been beat to death, but i gotta ask: what can i do to bring the idle down on my car? its a 93 civic ex that has a d15b with d16y8 head. i bought it a week ago, so this is all i can tell you. when i start it, it revs up to 2500 untill the temp gage starts to come up. it then will drop to about 1300 and stay.
then, as soon as i pull up to a stop sign, it jumps back up to about 1700, and fluctuates. just starting with honda tuning and this is driving me nuts as well as waking my neighbors when i go to work!!!

 

there should be an idle screw on the throttle body. play with it untill its back to normal. if that don't work, start lookin for a vacuum leak