Have any of you ever seen or heard of a HKS SSQV blow-off valve leaking? Pretty much between about 15 vac to 5 psi, if I'm only half throttling or so, all I hear is this big whoosh of air and a high pictched whistle which is why I believe the valve is not closing all the way and leaking. I also tested out taking off the vacuum line to valve and I noticed if I put my hand where it blows off out of, when the line is connected I can feel air being pulled into the valve but then when I take the vacuum line off I can't feel the air being sucked in any more. Pretty much I just want to know if you have any ideas on why this is doing this or any ways on how to fix it because to my knowledge this valve shouldn't leak due to it being a pull type and not a push type blow-off, but I don't know. Any help or info. you can give me would be appreciated, thanks guys.