no spark or power for engine

have been able to turn over engine but no spark… have checked spark plug and coil.! have limited power to back of coil but nothing going to spark plug… have fuel and checked engine stop and fine… ignition switch seems to be working..!
Reverse switch is working…did ignition primary peak voltage.. all is fine but no spark to plug… but voltage is not 100v with readings… about 60v…??? Did continuity check with wires to back of coil to ECM all ok..
Ignition pulse generator checks and voltage all o.k… and 5P .7 minimum voltage.. more really..!
Starter relay is fine…! checked voltage Relay and all proper fine… wire and connectors fine…!
Battery is fully charges and cranks great and holds a charge well..
coil peak voltage is way below 100V….
I do not know what else to follow up or check and getting a little frustrated… Sorrow for such a large mail but need advise…!! thanx….

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