check for an intake leak. I'm not exactly sure, i havent played much with these lately, been working on some turbo 4 cyl, and pro tractor and truck pulling motors, but if the mass air is before the leak the car will be thinking its getting more air than it is and dumping fuel because. it will run like ****. with the supercharger it is making boost just revving up so it makes it worse. a turbo doesn't make boost without load so it will still rev sitting still. common things are couplers blowing off or holes in piping or couplers. check anywhere the piping could rub on anything. hope this helps.
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