Thread: M104...what tells the ignition module to fire?
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Old 01-28-2010, 10:19 AM
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hispassion hispassion is offline
I switched to old VW's
  
Join Date: Nov 2006
Location: Apache Junction, Arizona
Posts: 112
I have a 1992 300CE with an M104 and my crank sensor is removed since it was broken and was only a plug-in for a test device. So, my question; How does the ignition module know when to fire? Is it also from a sine wave? And where does it get this sine wave? Maybe the cam sensor?

Just wondering. Thanks!
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