all obd 1 ecus are the same pinout EXCEPT 94-95 accords. it doesnt matter if it is jdm or usdm...

what year p13 do you have? is it obd1 or obd2?
if it is obd1 and you are using the obd1 distributor you either have bad wiring or a bad distributor.
if you are using any combo it is most likely wiring.