1. Spark plugs. If the spark plugs are worn or dirty, they can cause the engine to misfire, which will cause sputtering. Check the spark plugs and replace them if necessary.
2. Fuel filter. A dirty or clogged fuel filter can restrict the flow of fuel to the engine, which can cause sputtering. Check the fuel filter and replace it if necessary.
3. Fuel pump. A weak or failing fuel pump can also cause the engine to sputter. Check the fuel pump and replace it if necessary.
4. Air filter. A dirty or clogged air filter can restrict the flow of air to the engine, which can cause sputtering. Check the air filter and replace it if necessary.
5. Oxygen sensor. A bad oxygen sensor can send the wrong signal to the engine, which can cause the engine to run lean or rich, which can cause sputtering. Check the oxygen sensor and replace it if necessary.
6. Ignition coil. A weak or failing ignition coil can cause the spark plugs to not fire properly, which will cause sputtering. Check the ignition coil and replace it if necessary.
7. Mass air flow sensor. A bad mass air flow sensor can send the wrong signal to the engine, which can cause the engine to run lean or rich, which can cause sputtering. Check the mass air flow sensor and replace it if necessary.
