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This technique, of course, works best with higher resolution signals.
In this case, it was very helpful to easily see if signal degradation was the cause or the effect of a stalling situation as it illustrated where the RPM fell.
With further questions for graphing RPM. I have an earlier Ford with a hall effect internal to the distributor. From the wiring diagram i attached can i use any of the wiring you see to gain an rpm signal? or can i gain an rpm signal from the coil lead?
Taken from a ford tfi-4 ignition module it's the crank signal wire. Any guidance for turning this into rpm using the math function? Seems the reluctor has total 5 + 1 teeth?