I also drive a 92 lesabre, and I had the exact same problem as you did. I parked the car in front of my friend's house, and 2 seconds later the car was having a seizure.
Drove the car down the road, struggling to hit the 50mph speed limit, all the while feelling like I was duct-taped to one of those massage chairs at the mall.
Every stop light made my car bounce like I had some really crappy hydraulics that were outta control.
Sadly, at the time I had just gotten the car (which was NOT TREATED WELL), and so I took it into goodyear (NEVER do this....when I got my brakes fixed they didn't clamp the line and fluid leaked out; GY blows), and they set me back 400 bucks for the ignition system replacement.
As much fun as playing with HV is, when you only have one car it isn't a good idea.
At the very least I can help you be sure that your problem is with the ignition coils.
Igntion Coils, Fuel Lines, and Paint Jobs--The Silent Killer of the 1992 LeSabre.
(your paint isn't cracking/breaking, is it?)
--VrmlBasic