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The AC sine wave from the Pickup Coil is about 15 volts (peak to peak). The ignition module converts the AC sine wave from the Pickup Coil to a square wave for the ECM to "see" RPM's. An AC signal generator could be used on a test bench, instead of spinning the distributor to supply the ignition module an AC sine wave. A signal generator that can produce an AC sine wave of about 15 volts peak to peak and capable of changing the AC sine wave frequency from 0 Hertz to 500 Hertz will "Trick" the ignition module into providing the ECM with RPM's from 0 to 14,000 RPM's.
dave w
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