Electric Control Modules???

I have a 95 olds cutlass supreme, "Missing" as like spark plugs,wires, etc.
changed plugs and wires within the last month, had been running very well up until today. It's doing the same thing now again---- I suppose it could be a bad plug or wire but haven't had a chance to check it out yet.

Tomorrow I'll be looking at it. Question== Would the Electric Control Modules be causing this now. I measured resistance on each output when I replaced the plugs and wires, they checked OK then. When the ECM's go bad are they "flakey" or are they good or bad?

I think that is what their called, the three coils that the plug wires hook to.

Thanks In Advance, Xtech