blackcrx16

i just realized that a friend of mine had hooked up the bov to a t fitting that was clogged so it was not working. my probelm is that when i drive the car now and crusie around the city and on the highway(while driving) there is no smoke. when i stop and let the car idle for about 1 min or 2, it will start smoking pretty bad out the exhaust. would the bov not working for about a week cause a problem that would cause the smoke? any help would be much praised.