1987 200sx goes "tick tick tick tick tick"

sup guys.... i just today noticed a "tick tick tick tick tick tick" around spark plug #4..... it sounds like the plug somehow fireing prematurly... but dont know for sure or how......
anyone has any suggestions??



thanks much,
mai0f

depends, if it is only doing it when you are accelerating than ya it is firing prematurely, but if it ticks continously even at idle it could be a lifter that is loose.