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Cobb · 09-28-2014, 07:35 PM

I believe the CIS VWs have a secondary throttle and that maybe opening causing the vacuum drop.

09-28-2014, 07:35 PM	#6 (permalink)
Cobb Master EcoModder Join Date: May 2012 Location: USA Posts: 2,643 Thanks: 1,502 Thanked 279 Times in 229 Posts	I believe the CIS VWs have a secondary throttle and that maybe opening causing the vacuum drop.