1994 Ford Probe the engine seems sluggish and unresponsive

Engine Performance problem
1994 Ford Probe 6 cyl Front Wheel Drive Automatic 244k miles

despite a full tune up, except ignition wires, engine misses for split second and sometimes unresponsive to throttle inputs. Performance is like a 4cyl engine, ok compression and frequent oil changes and full transmission filter change and full flush, have not cured the problem, fuel pressure 22psi, at idle. My question is, does the ignition wires need to be changed, the wires are very hot, laser thermometer, indicates 180 degrees F in spots, overall 140 degrees F. Internal resistance is within specs.