my mate who has no internet has asked to find out why is car would not be running on no 3 cylinder.

when it was last parked up it was fine with no probs, now when u start it shes missfires and runs on 3 cylinders.

he said hes taken the plug out attatched it to lead and it sparks fine.

car will start but run on 3 cylinders.

would this be possible if the rotor arm was damaged or cap? or highly unlikely?

cheers