  We conduct three-dimensional hydrodynamical simulations of eccentric common
envelope jets supernova (CEJSN) impostors, i.e., a neutron star (NS) that
crosses through the envelope of a red supergiant star on a highly eccentric
orbit and launches jets as it accretes mass from the envelope. Because of
numerical limitations we apply a simple prescription where we inject the
assumed jets' power into two opposite conical regions inside the envelope. We
find the outflow morphology to be very complicated, clumpy, and non-spherical,
having a large-scale symmetry only about the equatorial plane. The outflow
morphology can substantially differ between simulations that differ by their
jets' power. We estimate by simple means the light curve to be very bumpy, to
have a rise time of one to a few months, and to slowly decay in about a year to
several years. These eccentric CEJSN impostors will be classified as `gap'
objects, i.e., having a luminosity between those of classical novae and typical
supernovae (termed also ILOTs for intermediate luminosity optical transients).
We strengthen a previous conclusion that CEJSN impostors might account for some
peculiar ILOTs, in particular those that might repeat over timescales of months
to years.
