I opened up/loosened the spring about half a turn, and it seems to be fine now. Give that a try, and see how things workl outOriginally posted by BigClunke
i thing im having the same problem with my HKS bov. i also notice it when i let off of the gas kinda slowly (abit hard to explain) it souns like the spring is causing the valve to flutter. with more spirited shifting its alot more accurate, no complaints.
what kind of adjustment helped? (i bought my rex used, i really know nothing about this bov)
BTW I only started having this problem when I installed my FMIC...do you have one as well, or are you on the stock IC?