Help with my dune buggy 3.1 multiport V6?

I'm sorry guys, I don't get E-mail notification here, and forgot where I posted this. I pulled th IAC apart, and cleaned the carbon off, and it worked for the noise it was making. I think it was trying to 'park', and couldn't find the correct position. It does have MAF, and I don't know what year it is. I checked the oxygen sensor voltage, which I was told should be around 450 milivolts. I got weird readings, and replaced it ($20), and it's a bit better. Still seems sputtery at part throttle, but only after it reaches operating temp. When you fitst start it it's in some pre programed mode, where the sensor readings don't seem to matter.
The PCV would be connected into the air inlet tube right after the MAF sensor? There's this 90 degree plastic fitting that's not connected to anything. And a black plastic tube coming off the valve cover. Maybe I need it reconnected? Would there be a conventional PCV inline?
Mike