Ive got a 92 Honda prelude and the revs have being fluctuating from 1000 to 2000, i know its a problem with the Fast Idle Control Valve as when you take the clip bit off of the throttle body, the revs go up to 2000 and it doesnt fluctuate. I was wondering if it would do any harm to the car leaving it unplugged, if so what?. And or is it a big job replacing the whole FICV Any help whould be APPRECIATED!!!!!!!!!

 

Give this a look and see if you can find your problem

https://honda-tech.com/zerothread?id=1979500