hello people im new here ...i was wondering if anyone can help me with my punt xreg 1.2 petrol..the revs have been going up and down by them selves lately,so i had a ecu falut diagnostic check on it and its come back with two error codes that the ecu needs changing..now heres the big question...can i just get a second hand one and stick it in ,or does it have to be programmed or something,or can it be modded so that the ecu will be just be happy to be put straight into my car...any ideas wil be appreciated..thanx...