I've stepped on it a bit passing people and it's fine, it doesn't really get too much boost though. When it's happened I'm just going normal highway speeds with cruise set and get to decent sized hill, it downshifts, boost shoots way up, and then all the noise starts. That's what made me initially think it may be a supercharger issue

It's had a fair amount of work done by the previous own, I'd compiled it from the receipts:

6/15/2012 198,057 Oil Change (inspection all passed) 5w30
3/20/2012 195,057 Replace FR Wheel bearing, real brake bad/rotors
2/17/2012 194,299 Alternator (battery 2 yr old)
7/15/2011 186,444 Traction Control C0035/C0036 Left Front Speed, sensor gooddamaged wire on left front wiring harness declined repair
7/5/2011 186,158 Exhaust leak, installed 5in pipe 54-8518
6/17/2011 182,788 New Radiator hose Replace front brake pads/rotors/RF Caliper
Installed exhaust flex pipe/MAF sensor?
6/8/2011 181,731 Radiator (1890) Aftermarket, not perfect fit
4/27/2011 182,788 Replaced front tires
3/25/2011 181,346 Left outer tierod, rf lower ball joint, front sway bar, left rear trailing arm
4/13/2010 165,839 repaired radiator fan wiring
9/23/2009 158,764 Replace both belts 12588411/12574914
6/2/2009 154,043 Overheats: Replaced lower intake manifold gaskets/related/thermostat
6/21/2008 136,878 Recall/Left Valve cover gasket & wire retainer
3/16/2008 ~136000 Tie Rod/Front Left Hub/Left CV Shaft/Fuel Filter/Exhaust Gasket
2/23/2007 130,845 New Transmission
11/9/2006 126,000 Replace both swaybar links
7/13/2006 - Windshield


Quote Originally Posted by osiris94ej View Post
Is it only when accelerating? If under a hard load or wot it could be something loose in the steering, suspension, or CV axle. When I got my car I had what felt like what you are describing. Mine had bad hub's, lower ball joint's, outer tie rod's, and both CV axle's. I don't know what item in particular was causing mine but after I replaced all item's and aligned it the vibration is gone.

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