DET3+ MAF to MAP conversion - voltage output OFFSET

Hello all,
im in MAF to MAP conversion, the process how to make it is clear, but im wondering one issue - If apply in Analog output offset to 2,49V, set modify MAF to ZERO and let operate fueling by DET internal MAP sensor as written in manual but current AFM produce when fully open under load aprox 3,68V so if apply maximum 2,49V which should be maximum voltage output to ECU MAF input then ECU dont provide needed fuel amount - if understand it correctly??..In every case be maximum output 2,49V which is not enough if understand the process correctly. Allready made conversion fuel Table from MAF to MAP, car starts, idling but not able to drive…Many thanks for any advice - change my mind or disprove my assumption :o)

THX

Jan