  We calculate detailed modification of pulses from a pulsar arising from the
effects of phase transition induced density fluctuations on the pulsar moment
of inertia. We represent general statistical density fluctuations using a
simple model where the initial moment of inertia tensor of the pulsar (taken to
be diagonal here) is assumed to get random additional contributions for each of
its component which are taken to be Gaussian distributed with certain width
characterized by the strength of density fluctuations $\epsilon$. Using sample
values of $\epsilon$, (and the pulsar deformation parameter $\eta$) we
numerically calculate detailed pulse modifications by solving Euler's equations
for the rotational dynamics of the pulsar. We also give analytical estimates
which can be used for arbitrary values of $\epsilon$ and $\eta$. We show that
there are very specific patterns in the perturbed pulses which are observable
in terms of modulations of pulses over large time periods. In view of the fact
that density fluctuations fade away eventually leading to a uniform phase in
the interior of pulsar, the off-diagonal components of MI tensor also vanish
eventually. Thus, the modification of pulses due to induced wobbling (from the
off-diagonal MI components) will also die away eventually. This allows one to
distinguish these transient pulse modulations from the effects of any wobbling
originally present. Further, the decay of these modulations in time directly
relates to relaxation of density fluctuations in the pulsar giving valuable
information about the nature of phase transition occurring inside the pulsar.
