02 Sensor?

Hey what are the symptoms of an 02 sensor goin out on a 92 prelude?

sputtering, shitty acceleration, bad gas mileage, rough idle...

If my sometimes, my car revs up and drops back down when i come to a stop, woulda that be 02 sensor?

what does it do? like when u put it in neutral when u stop?.....

Yeah, or when i come to a stop in first gear with the clutch in, it will rev up and drop back down quickly and keep doing that until i take off. Sometimes it does it, sometimes it doesn't.

that is somthing just with hondas i think, my first rex use to do that but i never figured out wut it was, i think its the idle control valve tho