Coupe GT miss

[Paul Haddock <haddock@garuda.atdiv.lanl.gov>]

	I have an 85' GT with 83k mi.  I recently have a miss in the 
motor.  It seems to only be noticable when your driving and the throttle 
is barely open.  You can feel the motor jerk a little back and forth.  It 
acts as if your blipping the throttle open and close.  I believe that the 
O2 sensor is the original.  It was recently tested and said to be good 
but this was before this problem arose.  I've replaced the air filter and 
plugs.  Has anyone experienced these problems from a bad O2 sensor? 
Thanks for any input.

-Paul
73' Audi 100GL
85' Audi GT
69' Camaro