stumbling idle and backfiring, PLEASE HELP!!!!!

[92_LSL]

Ok, so the fwd legacy transmission is in the car and functioning properly without the legacy TCU or the fwd fuse in. With that out of the way I now need to focus on the more severe problem I have on my hands. The car has had an ongoing problem that I have yet to figure out. The car will randomly develop a stumbling idle and misfire quite badly. I have changed the coil packs and plugs recently and this problem still persists. When i was test driving the car it started stumbling at idle, misfiring under acceleration, and backfiring. I really need this problem resolved so any useful input would be greatly appreciated.

Joe