Ok I have just done this swap. I have got a p28 ecu and an obd2b to obd1 conversion harness. I cant get the car to start. It seems I am not getting the fuel pump to come one. If I put my stock ecu back in the pump comes on and I can get the car to start. Although this ecu dosn't have vtec so it wont work right for the new motor. As soon as plug the other one back in no fuel pump. The obd1 ecu fuel pump relay is pin a7. This is running to pin a15 on my civic's harness. I am getting 10volts there. Any help on this would be great. Thanks.