It could be an issue with trying to control that part throttle boost; if the system is trying to regulate part throttle boost by rapidly opening and closing the BPV rather than holding the diaphram partially open could be an issue with how the vacuum from the intake manifold pressure drops to a vacuum and thereby operating the BPV or in unequal pressure between the intake manifold and the intake plumbing.
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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