heres the deal, my 95 GSR got its ECU stolen and the previous owner installed a p28 obd1 ecu in it. iv noticed that my fuel economy is really bad and i think its because of the ecu. therefore i want to get the right ecu for the teg and make it run the way its suppose to. a friend of mine told me if u chip out a p28 and use it, it would be better as it has better fuel maps and other stuffs...

my question here is should i do that or just replace the p28 with the p72??