leaking bov?

[9240sx]

How do i know if my stock Bov is leaking?My turbo seems to laggy.

[Blown240sx]

I dont know if you can really hear a boost leak... It might hiss if it is but I dont know why it would be unless it was damaged. Would it cause lag or just low boost levels?

[TougeTune180]

i had a slight leak problem at first with my atmospheric one, it was because there was the wrong sized O ring on it, and once i replaced that it stopped, but you could hear a slight hiss if you slowly got on the throttle from under the hood, like twisting open the throttle body by hand. i dunno if the same would apply to stock, but i dont see why you couldnt test it like that. hope that helps, good luck

[9240sx]

I hear a sucking sound once i start to spool up,But it might just be the turbo sound from the apexi intake.BOV works as it sould,if i let off the throttle it will let out the air,I can hear it loud and clear.