First pull a wire from a different cylinder, use the same plug, results?
Still no? Use the different wire and a different plug, results?
Take off your cap and rotor and check the condition?
If that dont work, I would assume it would have to be the distributor.
i used an old plug and disconnected wire by wire and all have fire but number 1 all make a ticking firing sound lol mob its a pita i dont like it either everything is new except distributer