possible boost leak?

[Mephisto]

i have a KB cold air intake... so like normal i hear the loud hiss as the turbo starts spoolin... but when i let off... i hear the typical horse sound, but its mixed with a pssssst whistle like a BOV just not as loud... could that be air comin back out the filter? or could i have a leak somewhere? not lookin for everyone to solve my problem just lookin for some suggestions or opinions...

 

[ParTyBoy]

Re: possible boost leak?

i have a KB cold air intake... so like normal i hear the loud hiss as the turbo starts spoolin... but when i let off... i hear the typical horse sound, but its mixed with a pssssst whistle like a BOV just not as loud... could that be air comin back out the filter? or could i have a leak somewhere? not lookin for everyone to solve my problem just lookin for some suggestions or opinions...

check the throttle body to upper IC hose.. sometimes the hose may not be seated correctly underneath/lower back part of the hose..

 

[Jimmy]

You never want to let completely off the throttle when you are under boost.It you close the butterflies,the forced air has nowhere else to go except back out from where it came(the filter)

 

[ghettosled]

one of the easiest things to do is pull the turbo to ic pipe and feed air into the inlet of the ic. you will pressurize the manifold and watch your boost gauge climb. listen for leaks.