BOV Flutter

[FattyBoomBatty]

Perhaps the vacuum line is hooked up to the wrong port on the TB or manifold? the only other thing is the spring strength, if you need a temporary fix, take the sping out and stretch it out so it's longer. or toss some washers in there like a TurboXS.

[HKSenilyks]

Yea sounds like a defective spring.