Nissan Altima shaking and slipping with fume smell, possible air filter crack and fuel/air ratio issue on Nissan Altima

Some Nissan Altima owners report experiencing shaking and slipping accompanied by a fume smell, which may be attributed to several potential issues. These include engine misfiring, which can lead to rough idling and loss of power due to improper ignition in one or more cylinders. Additionally, transmission failures, known to occur in the Altima, can cause significant slipping and shaking, often resulting in costly repairs. Worn or fouled spark plugs are another common culprit, as they can lead to misfires and contribute to engine vibration. Faulty ignition coils may also cause similar misfires and vibrations, exacerbating the shaking sensation. Furthermore, a cracked air filter can disrupt the air-fuel ratio, negatively impacting performance and possibly leading to the reported symptoms. Lastly, imbalances in the fuel/air ratio can further affect engine performance, resulting in shaking and slipping. It is advisable for owners experiencing these issues to seek a thorough inspection and diagnosis from a professional mechanic.