Re: puzzled HEI
Measure BAT voltage at the connector during cranking. The measured voltage should be within 0.5 volts of starting voltage measured at the battery posts, i.e., 11 volts during cranking at battery, 10.5 volts at BAT connector.
Plug gap at 0.040"?
Bad plug wire?
Bad spark plug?
If you have an aftermarket coil, its primary winding impedance may be too high for the stock OE module resulting in more current drawn through the module and module cannot handle the extra current.
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