The starts and runs fine for first few mins then starts to bounch around idleing wise beed some tips. F22

 

How often does it do it? My lude used to do the same thing. Typically a bouncing idle has something to do with your throttle positioning sensor(tps). Or if its not that its more then likely your iac valve on your intake manifold. There is a screen in there that sometimes gets carbon build up and jus needs to be cleaned out. Try cleaning the iac valve first. If thats not it then more then likely either the iac or tps could be shot.

 

fast idle thermo valve, trust me it happens to all hondas and it's the valve that is always overlooked.

 

Check out this thread from the FAQ,

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