Ford F-150 lack of throttle response, rough idle, blue smoke, excessive vibration, excessive fuel consumption, and misfires due to low compression on cylinders 4 and 8 on Ford F-150

Some Ford F-150 owners report experiencing issues such as lack of throttle response, rough idle, blue smoke, excessive vibration, excessive fuel consumption, and misfires, which may be linked to low compression in cylinders 4 and 8. This low compression can lead to symptoms like rough idling and misfires, potentially caused by factors such as recessed intake valves or coolant leaking into the cylinder. Additionally, problems with rings, valves, or cylinder walls can also contribute to low compression. To address this issue, some owners consider solutions like an aggressive induction service to clean the valves, which may improve compression levels. However, if the problem persists, more extensive repairs, such as fixing broken valve springs or addressing combustion chamber sealing issues, may be necessary. It is crucial for owners to address low compression promptly to avoid further engine damage, including excessive fuel consumption and the risk of engine failure.