The action of the airflow potentiometer is monitored by the KE controller. The controller is looking for rapidity of change (or acceleration of position so to speak). When one makes a sudden airflow change (flooring the accelerator), the controller gives an instantaneous mixture increase of 5-10 ma (probably a 0.1bar change in differential pressure). This is like an accelerator pump in a carb and does not stay. The increase in current is momentary and drops to nominal in a second or two.
Bosch Master, ASE Master, L1
33 years MB technician