Lumina running rough at times

Could use some help here. On x-mas eve I went out to do my last minute x-mas shopping and my 93 lumina Z34 started running rough and had loss of power while driving. Next thing you feel the power restore and is running fine but then a little bit later its running rough again. My guess is a plug is miss firing. I don't think its the spark plugs since they were just changed but i'm not ruling that out. Would appreciate any input on what might wrong

I was trouble shooting this same problem.

I found this out by accident one day. I was just closing up the car after I turned the lights out in the garage, when I looked at the coils one last time. What I noticed was a spark between two sets of coils. I replaced those coils and it ran great since then.

Thanks for the input. I asked around and I was told to change my plug wires. A friend of mine had the same problem also. He took it to the dealer and they just replaced the wires and that fixed it. Anyway its got to be either the wires, coils or ICM board. Thanks again

Well I bought a set of wires. Before I put any on I started the car and pulled off the plugs wires one bye one. The motor died down on everyone i took off except for the #2 plug which is in the front. I only replaced that one and took it for a long spin and it worked fine. Check the old wire when i got home and the clip inside was corroded.