So I picked up an OBD-1 P-72 with a Hondata S300. I purchased a OBD-2 toOBD-1 ecu adapter harness and no startup. Cranks I hear the hum of the fuel pump, put a test light in the black/white wire at distributor, have power to it.. car never hits, just cranks over. But it still will start if I swap the P5P ecu back in it. It is an SH .. but most of the components have been replaced with base model. I need this car to run on the chipped ecu , it’s fully built too to bottom , and my wideband is screaming I need fuel