Dodge Caravan rough idle and misfires at low speeds, specifically on plug #5 on Dodge Caravan

Some Dodge Caravan owners report experiencing rough idle and misfires, particularly related to plug #5. Common causes include vacuum leaks and ignition coil issues, which can lead to engine struggles. Spark plug failures or misfires may also contribute to these problems, with specific concerns arising from failing spark plug tube seals that can fill tubes with engine oil, resulting in poor performance. If the misfire is isolated to plug #5, it may indicate a problem with that spark plug, its ignition coil, or associated wiring. The OBD2 code P0305 specifically points to a misfire in the fifth cylinder. Additionally, issues such as dirty fuel injectors, faulty PCV or EGR valves, and oxygen sensors can also cause misfires. To address these issues, owners are advised to inspect and potentially replace spark plugs, ignition coils, and check for vacuum leaks. If problems persist, seeking professional diagnostic assistance is recommended to effectively resolve the underlying issues.