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 http://i118.photobucket.com/albums/o119/hrfnsf/DSCN0196.jpg you guys have to help me out here,... I dont think it was reprogramed or anything. But I know that you can use a OBD1 P28 on a OBD2 swap... you guys help me out on this,.... I might need it or just sell it. Let me know Hernueldo Flores - Orlando,Fl.