hello from greece!
i have a seicento sporting with the small ecu and i want to know if i can "unlock" the ecu and change some parameters like advance, fuel etc..
my option is to go with a haltech 550 elite ecu but i wonder if i can do this on mine.

the plan is to do some minor changes for now and then put a small turbo on it (0.5 max)

the other question is if i put the haltech its is going to be like factory car or i will get the check engine light and this stuff ?
i want to be like factory even with the turbo on it because i will choose the map beetwen low boost and high boost but i dont want to get any weard problems..
what is your opinion about it?