... engine 5, gaining momentum 6, easy increase speedSix characteristics:1, Well-designed, well made2, the fuel saver result is obvious: it can save ... the highest or the lowest.4, Because EFI car has automatic repair function, it is normal when idling speed increase and ... normal status.Post-installation testing methods and precautions:1, Installed well in order to avoid to leakage, or cause shaking and ...