i just got in my "94 g20 ecu" and the plug from my car wont fit it.. I have a 97 and the plug on the car is wider than the fitiing on the ecu itself.. is this normal? is this maybe an obd1 ecu.. any help asap would be greatly appreciated

i think it is obdI obdII was established strongly in '95

yeah; I thought the G20 went obdII in 94. IIRC the 94-96 should work.