73 valiant no spark from coil

67Dart273 said

Have you tried a clip lead from battery to coil + HOW are you measuring this 8 volts cranking?

Measure from coil+ to ground while cranking USING THE KEY and NOT by jumpering the starter relay

If that is what you did, then you do indeed have a bypass circuit problem

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I have not tried the lead from battery was going to try it when I get home from picking my daughter up at school, I'm getting the volts reading with the tester on pos and neg terminals on the ignition coil with key in on position it reads 4.7 when engine is cranked with key it reads no higher than 8 volts and only sends and occasional random spark when key is let back to on position from start. Not sure if I'm testing right that was on the volts test setting for ohms resistance it's hard to see what setting they have it on in the diagrams I.e. 200 20k 2000. I'm not the best with electrical but i can usually figure things out it's stumping me and thanks for the diagrams they are awesome