Ok I got a cb7 with a h22a. Don't know why but it's idling around 2000 Rpms. I've messed with the idle screw on the intake and it doesn't seem to make a difference. Any sugestioms? It's also throwing a cel 41 for a oxy heater

 

There is most likely a vaccum leak somewhere, your ecu code may be isolated.

 

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