Saturn Ion rough running and stalling issue with intermittent recovery on Saturn Ion

Some Saturn Ion owners report experiencing rough running and stalling issues, with intermittent recovery that can be attributed to several potential causes. These owners often find that vacuum leaks may contribute to rough idling, while dirty throttle bodies and Mass Air Flow (MAF) sensors can disrupt proper airflow. Additionally, worn or fouled spark plugs are noted as factors affecting engine performance. Some owners have also encountered problems related to fuel pressure, indicating that it may not be within the correct range for optimal engine function. Sudden rough running has been linked to bad gas, and signs of a failing fuel pump, such as stalling and difficulty starting, have been reported. Furthermore, electrical and sensor problems, including faulty wiring and ignition system faults, could also play a role in these issues. To accurately diagnose the problem, some owners recommend using a scan tool to read and record engine data. It is important to note that if the key gets stuck in the ignition, it is likely a separate issue from the rough running and stalling problems. Addressing these concerns systematically can help resolve the performance issues in the Saturn Ion effectively.