99 Honda civic ex

So to lay down some history before i start

car was an automatic previous owner made it to a manual while still using the auto engine harness (idk why he wasnt very smart).

Now to the present he and a buddy swapped the y7/y8 out and put an b18b1 inside got an used si harness and did the pinout exchange grounded everything perfect and using an p28 s300 v2 ecu. Switch everything that needed to be switch off off. Fuel pump wont prime.The b18 that we using came out of an auto 2000 ls swap over the starter trans and all that stuff to the correct one my main relay is getting power, getting power to my ecu no codes no nothing cant think of any reason the fuel pump wont prime everything is connected how its suppose to be . Any kind of info would be awesome.

p.s. we also call rywire to see if maybe we missed anything in the wiring side of it and they said from what we told them everything is hooked up and done correct.

thanks!