[JL8Jeff]

Maybe see if you can borrow someone else's coil and ignition module and swap them out. On my 96 SS I was getting an occasional misfire on a single cylinder that would then turn into a random misfire. The car ran great so I knew it wasn't a real problem. But I changed out the coil(went with an MSD) and ignition control module(new GM) and never had the problem after that. It very well could be your opti but it might also be a wire, coil or ICM. So try swapping them first if you can find someone to lend you theirs.