Fuel Injector O-ring question

[EEYORE5182@aol.com]

Hello all,
I'm a little confused with this, and I hope you can help.
During my discussions with other SE-R owners, I am almost 100% certain that
my o-rings are leaking fuel past the injectors.  I know that carparts.com
sells o-ring kits, but i am unsure of how these work.  are the troubled
o-rings on our cars on the outside of the injector, in a position where they
help seal the o-ring into the socket it fits into, or are they inside the
injector some how.  besides taking apart an injector (which i dont really
want to do) im at a loss on understanding this.
I know this this is probably effecting my emissions, as i failed horribly.  I
also dont want to ruin another o2 sensor due to me running rich (i want to
get a new one to help with the emissions).

Alex
'93 NX2k