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Reanimotion Reanimotion is offline
umop apisdn
 
Join Date: Jun 2014
Location: Brisbane, Australia
Posts: 441
OK, there appears to be just the four wires and no dedicated tachometer output.

The recommended Opto wiring for the MicroSquirt and MegaSquirt relies on Flyback voltage from the coil when it fires and the magnetic field collapses

The 123tune, being electronic, may have internal diode protection from that pulse and therefore the MicroSquirt can no longer see any reverse voltage to trigger from

Does your car have a tachometer and if so where is it getting it's signal from?
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1981 928S 4.7 ROW with KE3-Jetronic and Franken8 (AEM Inifinty) follow at [http://www.frankencis.com/Activity-Feed/userid/2]
Yes! mechanical/hydraulic constant flow injection can be managed by a modern EMS

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Old 09-25-2016, 04:19 PM
  Pelican Parts Technical Article Directory    Reply With Quote #611 (permalink)