I wonder if You can swap a Gems ECU. Not sure about Morgan but in a Rover the ECU has security that will not allow another ECU. I have a GEMS EFI that I wanted to install in My +8 Bitsa. But I will need to use an aftermarket ECU. At the moment I was going to use "MegaSquirt". But after Collins message about "cold start" I wonder if MS has the circuitry to run a GEMS.
Better check, I am a light weight when it comes to EFI.
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Seattle