2. Faulty oxygen sensor: The oxygen sensor measures the amount of oxygen in the exhaust gas and sends this information to the engine control unit (ECU). The ECU then adjusts the fuel mixture accordingly. If the oxygen sensor is faulty, it can send incorrect information to the ECU, which can lead to bad gas.
3. Catalytic converter problems: The catalytic converter is responsible for converting harmful pollutants in the exhaust gas into less harmful substances. If the catalytic converter is damaged or clogged, it can cause the engine to run poorly and produce bad gas.
4. Vacuum leaks: Vacuum leaks can cause the engine to run lean, which can lead to bad gas.
5. Incorrect fuel: If you are using the wrong type of fuel for your vehicle, it can cause the engine to run poorly and produce bad gas.
6. Engine problems: Bad gas can also be caused by engine problems, such as a blown head gasket or a faulty piston ring.
