I'm not sure what you are doing, since the EHA does not 'adjust'. If you are adjusting mixture on the airflow meter, then this should not be necessary after replacing the EHA unless someone previously MIS-adjusted it to compensate for an improper mixture due to the failing EHA.
Steve
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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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