when i get to a cruising speed around say 50 and am at a steady rpm im getting like a miss sound coming out the pipes. i dont know if its just the exhuast or somthing wrong. its not an actual miss it just sounds like a quick miss then its fine then miss etc but it doesnt seem to be in the motor. i know my passenger side o2 sensor is shot will that cause this? if you can understand what im trying to say