BOV closed at idle makes car die?

So i got my sr20det running and i just felt a ton of air shooting out of the BOV. So i decided to close it with the adjustment screw(greddy type-s) as i tighten its ok but once its almost shut and no air is coming out of the bov the car dies:S? but with the bov open and shooting air out of it at idle it runs fine. And yes if the bov is shooting air at idle and i give it throttle it closes. BTW i cant drive it yet still have driveshaft ect to hookup.