Ok I know that I complicated too much, but thats just because I have no idea for some thing which makes me .

"...do you expect boost to continue entering the plenum when the throttle plate is closed?!" No and this is not my problem. you didnt understand my bad english.

when I connect boost gauge to pipe after intercooler (aluminium thing which goes from IC to engine) I dont have vacum but I have boost 0.7 bar. BUT when I connect boost gauge to inlet mainfold I have idle at vacum but when I driving hard in 4th gear or 3th gear and push throttle hard I have only 0.2 bar boost maximum! why?