What game?  Most the 'classic' Ballys had 25-500 coils in them.  If the coil is the right one for the game you may have a problem elsewhere (EOS switch, flipper switch, enable relay, power supply issue).

its my space hawks game, its bell games convertion for bally pinballs. thats why im asking about coils and best way, want to just see my options as the strength of the flipper is a little weak