Start it up while its dark and look for any spark leaks in the wires [especially that #7 wire]. It could be old wires leaking. Also try dielectric grease in the spark plug boot ends and check for any corrosion in the lead [coil] wire.
I put new wires on mine except for the coil wire [wrong '96 style sent] and it still had a miss. It was the coil wire in my case and I tell you, I couldn't get much out of the engine due to stumbling, backfiring, etc...
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