I've talked to a couple of skyline lovers about this problem and they said it's could be one thing,
i strongly agree about some intake been short, of course you can make them longer and,
also put a couipe of bends into the intake.
What happens, when you change gears and because of your intake been short the
turbo blows air back through your intake and your AFM reads the air and the
computer dumps a lot of fuel into your engine but there is no air so you car stalls.
I hope you can understand what i mean.....And i don't your BOV is the issue....
Thats what i have been told.