it is erratic firing from the coil wire.It sparks when just beginning to crank and when you let go of the key and the sparks are very erratic in between,no distinct pattern.It may spark 3 times a 1 second apart then not spark again for another 4 seconds.
I had the ign. coil tested today at two different places and both checked it OK.It is a 73 Charger with electronic ign.
I had the ign. control module checked out it also was OK

The rotor button is turning.
How often is the coil SUPPOSED to fire??Thanks for the replys so far.