HEI Ignition gurus Help!

Syleng1 said
You did put the dielectric grease between the heat sink and the module right?
Also did you double check the Airgap between the reluctor and the pick up inside the distributor? Brass gauge only and I think it’s .017”- .020”. Double check a service manual.

No it's more like .008". Inches not metric. Make certain the reluctor is not striking the pickup. And "work" the connector in/ out several times, there is no real current in there, and it does not take much corrosion to stop the signal.