Ford F-150 rough idle issue with P0307 code despite replacing #7 injector on Ford F-150

Some Ford F-150 owners report experiencing rough idle issues linked to a persistent P0307 diagnostic trouble code, indicating a misfire in cylinder 7, even after replacing the #7 injector. These owners note that the misfire can lead to loss of power and increased emissions. When the injector replacement does not resolve the problem, further diagnosis is often necessary, including checking for intake leaks and replacing spark plugs in cylinder 7. Common causes of the misfire may include ignition system failures, fuel system problems, or mechanical faults, which require thorough inspection. Additionally, some owners find that inspecting the coil packs and connectors for damage is crucial, as brittle or broken connectors can lead to intermittent misfires. If the misfire code continues to reappear, a comprehensive examination of all potential causes is essential. Ignoring the P0307 code can negatively impact engine performance, fuel efficiency, and overall power output, making prompt resolution critical to prevent further damage.