1 own a 1990 civic dx... im looking for the location of the (iacv)to clean it... i can't seem to locate it though... if anyone has pictures or diagreams it would help greatly

It's located on the back of the plenum (close to the firewall) and held on by two bolts. This link may help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-7.html#post1054149