i dunno the air fuel ratio...i tak nampak when the tuning session.. yeah yeah..the fc so terible..er.. i drive to melaka at 110-120km/h only oh. i see milage from klang to melaka 105km then finish fuel hahha zzzz... dunno how to do dah..eh can adjust the boost? mine is 1.1bar only..how to reduce ? i use hks boost controller.heh..