Yes it was me that had magical dizzy movement, still not figured out how because externally it clamped tight. Was running fine and then within 30 seconds started spluttering, then died and wouldn't restart. Got towed home after 4 hours trying, then eventually found the problem. Had only just set dizzy few days before so didn't suspect it!
I have had many situations on my 92 3.5 where it has been super rich and wetting the plugs and generally not running, but tbh I've not had major misfire.
Have had the regular misfires that have always been ignition but not usually a difficult fix. New plugs and this last time I had to check resistance on all my leads til I found a couple that had fouled terminals.
If its missing on one whole bank it could be injection. Remember 14 cux bank fires so it could be a bad earth to one bank of injectors, bad wiring/connections or possible bad ECU.
I would take all plugs out and rest on the rockers, turn off the lights (or at night) and spin over, can you see a spark on all 8? Make sure every plug is earthed off the engine nicely.
If spark looks good then check timing, if not then obv check over ignition system...