misfire/spudder

My wife 93 civic 5 speed 1.5 engine(198,000) is driving me nuts! her car has a dead misfire/spudder but it still have all power when driving. I have replace the head gasket(6 months ago it was running fine after head gasket replacements),timing belt,wires,plugs,ignition coil. Now im thinking about changing the distributor itself.... the fuel injectors all sounds the same! Somebody help,because im tired guessing....trying to avoid Honda!

ignitor in the distributor may be bad