pcv sucking oil ?

I highly doubt the accelerator pump needle valve missing would cause your issue. If anything it'd cause it to hesitate. My guess is you need to jet the carb down 2-3 jet sizes. What size and performance level engine are we talking here?

As the others said if it were oil it'd be a bluish/white smoke. And as for the pcv valve and oil found in it, you'll find oil in nearly every pcv valve you pull. That's one of their drawbacks and one reason racers eliminate them and install a header vac kit. Since header vac kits don't always work well on a street car you can keep excess oil out of the combustion process by installing a catch can system in the PCV line and drain it every so often. I picked up a small tank off of e-bay that works fine and only cost $15 shipped. About every 2-3 months I drain it. Never has much in it but I don't want any getting into my fresh engine.