a bad cylinder miss on my 94 300 ZX

my codes coming up are 32 and 34 which
is 32 is the EGR function and 34 is the
detonation sensor circuit would either one
of these codes make my car have a miss
like a bad plug wire arking?It seems like if
I had spark plug wires
that they are Arking but it doesn't have
plug wires it almost seems like a bad coil
or a leaky injector it does it real bad when
I'm in 4th gear with a low rpm.does
anybody know what it might be or where I
should start looking to fix this miss in my
cylinder?I do you have a leak in my
plennum,so I need to replace those
gaskets other than that seems like maybe
a bad coil.it doesn't do it At idle except
sometimes it does but very slight so its
hard for me to pinpoint the exact cylinder
or problem from an idle.my TPS switch
wires were pretty corroded so I clean
them up and sometimes when I Nail it off
the line it's a little sluggish and
sometimes it takes off pretty good so can
anyone help me with this?its bugging me
pretty bad.