Nissan Pathfinder unstable engine operation issue on Nissan Pathfinder

Some Nissan Pathfinder owners report experiencing unstable engine operation, characterized by symptoms such as jerking during acceleration, loss of power, increased fuel consumption, black smoke from the exhaust, and a persistent check engine light. Common causes identified include fuel system issues, such as a dirty MAF sensor or throttle body, as well as ignition problems related to faulty ignition coils, spark plugs, or ignition wires. Additionally, some owners note that engine rattle may stem from timing chain and tensioner issues. To address these problems, it is recommended that owners check the fuel supply and condition of spark plugs, clean the throttle body, inspect the exhaust system for faults, and consider replacing the timing chain if necessary. For accurate diagnosis and appropriate repairs, it is advisable for affected owners to consult a qualified mechanic.