Ok, so my engine usually idles just fine but when i come to a stop light it will idle really low like its about to die and after about five seconds it idles back up. what could be causing this? maybe the pcv?

oh and i drive a 98 honda civic dx d16y7

Try cleaning the IACV:

http://www.hondacivicforum.com/m_566911/tm.htm

http://www.superhonda.com/forum/f94/diy-cleaning-your-iacv-144463/

You can also try adjusting the idle screw on the throttle body.

well neither one of those diy helped since my intake manifold is different than a y8 but i figured it out and got it cleaned. it seems to idle alot smoother now so i am happy. :D