Car running Extremely Rich
 

My car ran extremely rich today on the way to work today. When stopped at a light the smell of Gasoline was overwhelming. There was also some smoke coming out of the exhaust. It didn't really look blue. After work I drove home and it ran a little rough but there was no smoke and no gasoline smell.
What's the first thing I should check. I was told to check the "vacuum fuel pressure regulator" (I think I said that right). But I'm not sure where it's located.
By the way it's a 92 with the 350 tpi, and there are no trouble codes.

Note: I did have an injector swapped a couple weeks ago because it was shooting fuel excessively. But it's been running fine.

Bad o2 sensors are notorious for doing that aswell. Mines running extremely rich right now, ill let you know if the O2 sensor fixes that.