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Forum nameEngine Management Systems & Controllers
Topic subjectRE: Megasquirt'nSpark Extra- Board Mods for Ignition control & 420A Wiring Diagram
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=54&topic_id=363&mesg_id=574
574, RE: Megasquirt'nSpark Extra- Board Mods for Ignition control & 420A Wiring Diagram
Posted by ner947, Dec-31-69 06:00 PM
The 4G63 ignition transistor module looks like this.
The part number on the heat sink is MD149768, it's a bit hard to read because I shrunk down the picture.



I picked up this one for $10 at my local junkyard, it works like it should.

It's pretty easy to lift one of these from a 4G63, it's bolted to the right side of the head only a few inches from the coilpack.
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