Ignition Control Module problem

Spunk said

Where do you ground the ECU at? I have a ground strap going from the firewall to the engine block but do I need a separate strap for the ECU or just use nuts and bolts? Sorry I am having the same issues with my 69 Dart and thought I would ask the question here.

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The ECU was designed to be grounded via the case and the firewall. In other words the bolts need to be tight, and you need to use star lock washers. THIS IS POOR DESIGN. Yes, I know, "mullions" of these were driven "buillyons" of miles. It is still poor design. You will never ever see anything such as military electronics or NASA, being grounded through the enclosure like these.

You CAN add a separate ground wire, say, a number 10 jumpered over to the regulator, and to the engine block. But whatever you do, the bolts must be tight and use lock washers.

If you want to be "fancy" they make a tool to grind paint off around a bolt hole. I admit, LOL, I just scrape around with a screwdriver or knife, etc.