Mine has done the sluggish thing only if I'm in 1st about 4500-5000 rpm and rolling then floor it WOT and bam, falls on it's face, but I don't let off and it takes a second and takes off like crazy. It may be something to do with the rev limiter or ???. Only in first gear, second gear at that same scenario is normal. I changed my pump already to. Thought it was my pump too, I think when the pump fails the car doesn't even have any giddy up. Mine still did, but thought the pump would fix it. The main difference is that my car doesn't run like an old v6, it still runs very strong. So maybe the sc clutch might be a new problem for the six. Keep us posted, I think it will be very hard to diagnose, or maybe the supercharger will get replaced like some of the other guys on here have had done.