Reply To: Testing voltage to the points on the Sportfour Imperial

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October 28, 2025 at 8:48 pm #301027
JACQUES
Participant

    I am no expert on your engine type but… JMHO…..if you measure voltage on or across point that open an close the voltage will be at max value  during the open air gap of the point because by ohms law….. the highest voltage appears at the highest resistance point (air gap)  of measurement in a series circuit.

    your  meter is  only showing you a value  made up of PEAKS ( when the gap opens)  and  something (when the gap closes)

    analog or digital meters are to slow to react (damper)  to these fast fluctuations and the only way to “see” what you have is with  an oscilloscope..

    https://youtu.be/-arFz0cI5jQ

     

    if you feel adventurous Amazon has lots of  inexpensive scopes  below 75$

     

     

     

     

     

    Joining AOMCI has priviledges 🙂