  We measure chiral susceptibilities in the Coulomb phase of noncompact QED$_4$
in $8^4, 10^4$ and $12^4$ lattices. The MFA approach allows simulations in the
chiral limit which are therefore free from arbitrary mass extrapolations. Using
the critical couplings extracted from these calculations, we study the critical
behaviour of the chiral condensate, which we find in disagreement with the
predictions of logarithmically improved scalar Mean Field theory.
