[dtuerk]

Check the turbo charge piping for a blown hose or cracked pipe, It sounds like unmetered air is entering the system and metered air is escaping somewhere. I currently am facing a similar issue, but when I go up hills I blow thick clouds of blue smoke out... My turbo is shot. So I hope you don't have the same issue! haha

*EDIT*

Also, on a stock car, you should be making boost pretty much anytime your accelerating. I've see up to 17-18 PSI MAX on my stock tune.