Sorry I tried to post to this topic, but Eric had
the reply time set at 1200 seconds, so I saved
my mesage to send later,
here it is
Looks like you are running rich, so rebuild or
adjust the carb, and replace the cat, running
that rich ruins the cat.
Looks like the NOX are ok, so either you are
running rich enough to slow the burn and keep
the NOX down or the EGR is working very well,
should the NOX go up after fixing the other #s
then you will need to service the EGR valve, and
or clean out the passages