These cars dont need tuning... Hell, u dont even have to clean the plugs or the throttle body because these systems are not meant for routine service... Plugs are self cleaning and use genuine air filter and good fuel and it ll be trouble free...
i went to Nazir autos for Eco Idle issue and Allah ka shuker hai it is resolved... The set the car into eco idle relearn mode and cleared all codes and voila it started working on first stop...
Sattar is a very nice guy and seemed to know wat he was doing...
Cheers...