1998 dodge neon missing??

Hey guys! I drive a 1998 dodge neon!
Recently my friend and I have
changed the o' rings on my fuel
injectors, the o2 señor but upstream
and the turqe converter soliened. ((In
your transmission to help the car
shift?))))

Before we changed those out I was
getting only 60-70 miles roughly on a
full tank. We changed those out in
the order and after the solineod was
changed the car starting to run so
much smoother and better.
My gas mileage improved a lot I'm
getting over 100miles. But now my
car is missing, when I'm on the
interstate it misses lightly, and this
morning I was going up a steep
incline on my way to work and the
kept missing more intensely.

I've ordered fuel injectors, to me it
seems like it's clogged up
somewhere or just getting enough
something, somewhere if that makes
sense?

I don't think my car has a cadilac
converter, because the car is loud so
maybe it has already been beat out.
And I have already done neoumes of
gas treatments.


I don't know much about cars
considering I'm a twenty year old girl,
so all the help & advice is
aprechaited :)