Your option at this point is to get a second opinion either from another smog station or the state's Smog Check Referee's Office. If it is found that the smog station which failed your Dodge Tioga because of the carburetor made a mistake they will recommend you contact the Bureau of Automotive Repairs investigation unit and file a report. You may be able to recover your smog inspection fee from the smog station. To schedule an appointment with the state's Referee's Office call (800) 622-7733. They will recommend you a local referee field station.