shift trouble related to mas sensor?

:smokin: :smokin: :smokin: :smokin: 1997 sable has had 2 mas airflow sensors installed and
they seem to correct the hard shift into 2nd gear only
temporarally,then it returns with check engine light.
The geniuses at the ford dealership have no answer and
I would like find and repair the problem cheaply before I
put my money into this car. Does anyone have an answer
or similar situation out there?