FieStooner

I just transferred my rb25det neo to skyline R31..after done connecting the wires and ecu the engine runs normally steady..but when i rave the engine it cuts on 2500 rpm..this car doesn’t have a socket to plug in the diagnose device for resetting the system..if i should reset the ecu is there other way to manually reset to normalize the engine rave(non cut on 2500rpm)?..