The negative side of your coil is grounded by the distributor and the ecu and fires the coil when grounded.
If you have power to the coil on + side,disconnet the negative lead completely from the coil and put a temporary wire to it and with the coil wire near metal tap your negative temporary wire to a ground and if the coil should fire.Then the coil is good you need a distributor or ecu.
TXDart
P.S. Of course with the key on.