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01-12-2013, 11:30 AM	#1
glljr Registered User Join Date: Jun 2011 Location: Douglassville PA Posts: 82	Supercharger Having an issue on my weiand 177 I put it on the dyno yesterday to do some tuning and the vaccum secondaries are not opening at all. Put a lighter spring in checked for vaccum and couldn't find anything that would cause it. Any ideas as to what would be causing this?

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