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Old 07-27-2010, 11:33 AM   #41
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Join Date: Nov 2009
Location: Connecticut
Posts: 1,073
My Ride: 2005 ZHP TT Stg 1
Originally Posted by PEI330Ci View Post flattens things out alright, just not in a good way.

Disa=resonance flap
Iacv=idle air control valve

*sent from my iTool
I didn't mean it as a fix - just an experiment - but I DID think they were the same thing . This Bentley diagram helps demystify:
(btw - is the theory that the DISA flap action triggers knock sensors resulting in the dip?)


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