ok sorry bro i was confused. ok now that we are on the same page here ya go. it is a little dangerous but if u have a non - firing spark plug wire this is how u can determine which it may be. u can go to any certain spark plug wire pull it off of the spark plug as if u were going to replace the plugs and pull out the spark plug as well, once u have the park plug in hand put the wire back on the now in ur hand plug as if it were in the engine and lay the wire while connect somewhere in the engine bay (where it will reach) preferably near a screw or something it will ground on and start the car if the spark plug sparks u know that wire is most likely still good. do this until u find a spark plug not firing (sparking) and that is your culpret. godo luck bro beware the plug while out of the engine will make a decent size spark and it will make a zapping type sound this is normal.