Looks like an old piggyback ECU. Not too useful nowdays.

That's the one that machv sold. ecu+ or something

That plug in harness will probably have some interest all by itself. Those harnesses seem fairly rare, and I always see people talk about building them, but they are a hassle to get right. Can you post more pics of the way the big PCB mount connector is attached to the wires?

Thanks for the info, I'll post more pictures tomorrow.

Man I haven't seen an ECU+ EMS system in YEARS! This was around before ECMLink V3 was an idea, and is honestly actually fairly robust. But it is EXTREMELY old. Very capable though! Blast from the past.

Sounds like a piece of history maybe I’ll just keep it around for display. Here’s more photos of the jumper