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iTrader: (5)

I have wierd issues at times.. This weeks issue.... Tach flutters and engine will miss at times.....so I changed some parts still there thunderbolt ignition ..... So after it didn't fix it I turned key to on position... Tach jumps and I hear light spark in distributor..... So I eliminate ign box... Still does it.... Then I eliminate box AND pick up coil.. Still does it... Replace coil..... Still there..... Something is energizing just coil at times with key on..... But if keys on it already has power.... What would trigger a spark with all ign components disconnected? Seems like a grounding issue to me..... I am going to check and clean every ground..... Anything else to look at????