ecu is different because it has the knock sensor and the pin outs are different, i am curently using the interior wiring from that car to run my 5efhe engine so had to see the pin outs, most peoply try to just plug the jap ecu in and the car dont fire up, need to move a few pins about to make it work on a uk 4efe, why would there be a knock sensor on the jdm 4efe ?