Saturn Ion rough idle and misfire under load, especially uphill on Saturn Ion

Some Saturn Ion owners report experiencing rough idle and misfire issues, particularly under load and when driving uphill. These problems can stem from a bad coil pack, which often leads to noticeable misfires at idle. Additionally, common causes for rough idle include vacuum leaks, spark plug issues, and ignition coil problems. Some owners also note that failing fuel injectors may result in symptoms such as rough cold starts, poor throttle response, and decreased fuel economy. Furthermore, shaking during idle can be attributed to misfires or bad motor mounts. Engine misfires, frequently linked to spark plug or coil pack issues, can hinder proper acceleration. To address these concerns, it is advisable for owners to check for bad coil packs, inspect for vacuum leaks, assess spark plug conditions, and evaluate ignition coils. Monitoring fuel injectors and conducting professional diagnostic testing may also be necessary to pinpoint and resolve the underlying causes of these symptoms.