1990 Honda Accord Ignition Output Signal

I have a 1990 honda accord ex 5spd with aftermarket msd ignition system & msd modified distributor cap for external coil. I was driving it one day when I noticed it started running rough so I pull off the road n opened the hood while the car was still running when I noticed one of my spark plug wires had came loose from the distributor cap n noticed that I could see the spark from my distributor cap jump to my cold air intake n onto the ground body of my car. So I turned it off to avoid being shocked n put the spark plug wire back onto the cap n when I try to start the car it kept cranking over but wouldnt start. I have replaced distributor, ignitor, checked all fuses n still cant get it to start. I keep getting code 15(ignition output signal) from ecu but cant seem to find the problem even after replacing the ecu. Can someone please help me with this problem? Thanks in advance