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Old 05-20-2017, 09:17 AM   #2
12pbsti
Scooby Newbie
 
Member#: 305468
Join Date: Dec 2011
Chapter/Region: Tri-State
Location: Oradell NJ
Vehicle:
2012 IAG Built STi
OBP

Default

You didnt have the boost/vaacume line connected. When under boost the pressure increases on the diagram to keep it shut. Without the line connected the diaphragm only has atmospheric pressure to help it stay closed.
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