I would like to know more about how the Auto Tune tuners work. I know they read the sensors, and make adjustments, but what are they adjusting to? Do they make adjustments to the base map installed, or to some AFR? Do these tuners ever go into a closed loop mode? I am sure the different manufactures may do things differently , but I would assume they are all trying to achieve the same goal, but I can't find anything in writing as to what the auto tune systems are actually trying to achieve. Thanks.