I have a 1992 h23a1 in my 92 accord. I have a surging idle as well. But mine is a bit different. I have looked around and searched the site but cant find much info. Anyway, here's my problem. The car starts and warms up like normal. But after i drive for a little bit the rpms start to bounce when ever I'm at a light or stop sign, or sitting at idle. They jump from normal idle to about 2000rshared_pm or so. If I turn on my headlights and my defogger the surging stops. or if i hold down my power window switch. (any type of power draw) What do I need to do to fix this? I'm tired of everyone thinking Im trying to race at every stoplight.

 

Search better. https://honda-tech.com/forums/honda-prelude-4/end-all-idle-surge-bounce-etc-problems-thread-1979500/