Its a 91 Integra, i think the O2 sensor is before the cat on it, so I think that rules that out.

The reason i am asking this is to know if its a problem with the car that may cost me money later, I just hope that its not running to rick/lean for any reason, I hope its just the O2 sensor going bad, but it doenst sound like it since it only happens at one speed...

Anyone have any ideas?