I just got a 1990 crx with a d16z6 swap in it. When its cold it seems to be idling fine but as it warms up it sarts idiling funny sitting at about 1k rshared_pm droping to 450-500 it seems like. But while driving its fine only when stopped. I am very new to hondas just got this today lol any ideas on what it could be?

any help would be awesome..

 

vacuum leek is likely, then could be a problem with icm