ok i posted a thread awhile back about wiring for a B18A1 in a 90 crx si. thought it was was suppose to plug and go. but we dropped the motor in and hooked up everything and there was one sensor on the b18a1 that wasnt on the crx the sensor is on the back of the motor and it is a green round plug with a white/green wire and a black wire on it dose anyone know what sensor it is and where to put the wires on the ecu pinouts? the motor runs but it is flashing code 43 which is the fuel supply system. and when you drive it normal it runs fine but when you smash the gas in dies and wont start for like 12 to 24 hours. i think the motor is starving for fuel but i dont know it might be a electiral problem. does anyone know where i can get a schamatic for the b18a1 from? thanks.