Brad

I'm using non-obd electronics...on the b20 motor there is a brown electrical plug on the water neck for the rear radiator hose. Does that need a plug to be connected to the ecu? Also the b20 doesn't have a knock sensor or the other plug near the oil pressure sensor with the 2 prongs sticking out. Do I need either of those for a non-obd pr4 ecu?

thanks,
Brad