buy aftermarket ecu but pre-tuned price also almost the same as buy second hand standalone.
aftermarket ecu also need re-tune, as standalone also need re-tune. why only standalone need to standby money? care to explain nappx?
cut it short,let's say i upgrade to a bigger injector,and there's a show of lean fuel.by avoiding using supplementary injector,just using bigger cc injector,let's say 750 or 1000cc injector, do i still need to...