Any boost controller? Sounds a little bit like it could be a sticky wastegate.
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Car Sold! Pleasure being a part of the Z community. 
New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)
Last edited by Nixlimited; 05-14-2013 at 05:50 PM.
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