i think i need to replace the supercharger but im not sure

I had the same problems. As far as the supercharger; I replaced mine as the first thing. It sounds like there is rockes in it. Not a bad repair just finding one under $1000 is the trick. There is a place in california that sells them with a 6 month warranty for under $500 which includes a core charge. I think it was called superchargers plus. That helped but did not fix the problem. For me the final thing was a bad ignition coil. There are 3 and one was barely working. Now if I could just fix the gas gauge. Good luck!

ignition module seems to be the problem.. replace the module and coil and i'm thinking it should run well again. happy motoring!

I have the same problem and to this day my Poor Car sits in my garage, 1300 for new one pretty steep for a car part. But I don't want to sell it I'm going to find the above mention company that can invest 500 into.