ignition problem help
 

hi!
My 86 NA have a little problem
when a start it , sometime it run well but sometime it don't want to go over 1500-2000 rpm
like a misfire problem
and today i touch the leading coil with my hand and i just take a electricity shock
so the coil , wires ans spark plug are good by the FSM
what is that?
anyone have an idea plz!