Bypass valve issue

[bades]

alrghty guys this isnt my first turbo car... but this is the first time ive ever had an issue like this.... at idle when i take the recirc line off my stock bypass valve air is coming out the discharge nozzle..... is this normal with a stock bypass valve??

also sumtimes boost will hold at 13-14psi and others it will only peak at 12 psi and drop to 10psi...... i have a mbc holdoing pressure..... and sumtimes the turbo will peak over 14 psi around 15 and the car will start breakin up really quick....

any ideas guys?? and yes i have searched for many weeks now....and tried everything....

[SullivanRacing06]

ok first step take the mbc off the car and hook up the pressure source to teh w/g before you blow up your motor, IF you ever owned a turbo car before youd know they have this thing call "boost cut" or mabey your pinging or detanating????? hmm,

and wtf, what car/ motor are you talking about?

need infol before we can even think about helping you out