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Cheers, I appreciate that input...sincerely! are you using 3/16" hose? and does this amount of boost on a open MBC seem high to you? Assuming that it is not caused by a leak (which i doubt that it is) is there any thing that i can do to drop it down? I am looking to boost at about 8psi.

I have the JoeP MBC its essentially wide open (without having the valve control completely removed) and it doesnt drop lower than a little over 9psi with a spike hitting around 10...Now I hit the fuel cut today for the first time....and the second and third time for that matter...I am thinking...