I have found a ecu in my closet and really don't remember when I gotten it. Anyways,.. this is the weird part.
Its a " 37820-P28-A04 " 92-95 OBD1 Civic Si/Ex BUT it has a OBD2 connectors on it.
http://i118.photobucket.com/albums/o119/hrfnsf/DSCN0195.jpg...
Check the ground near the thermostat under the hood. It should be with 4-5 black wire connecting with a 10mm bolt. I had that same problem before while we were doing a motor swap. A friend of mine losened it up for what reason? I dont know but it took us an hr to figure it out. Good luck...
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