I've had myTurbosmart Dualport Kompact BOV installed for a little over two years now fully vented. During this time it has worked like a dream, however over the past couple of weeks I have noticed it mainly doesn't open at all and when it does it's only when the cars at full running temp and smashing high boost. I have shortened the vac line as much as possible to avoid kinks, just wondering if there is any sort of maintenance required for this BOV's? Any help would be good