Bucking stalling 1996 Buick park ave

1996 buick park ave ultra 3800 eng supercharged eng. Intermittent bucking and junping at all speeds and idle. Changed tps, maf, oxygen sensor, ignition coil pack, plugs plugs wires. Checked fuel pressure ok.
checked vaccum areas for leaks and checked grounds all ok. Made problem worse. Am gettin a p102 code and the traction off light comes on when this happens. Car starts good but starts doing the bucking after a few minutes, even when not in gear.
cor has 152000 miles on it.
also disconnected the supercharger and still did the same? Thanks to anyone who can help larry