Ford Ranger cold start issues with misfire on cylinder 3 despite multiple part replacements on Ford Ranger

Some Ford Ranger owners report experiencing cold start issues accompanied by a misfire on cylinder 3, despite having replaced multiple parts. These owners often find diagnostic codes like P0303, indicating a misfire in cylinder 3, and may also encounter a P0300 code, suggesting random multiple misfiring across cylinders, which necessitates a thorough diagnosis. Additionally, some report problems related to valve seat recession in the 3.0L engine, which can lead to misfires; checking for differences in RPM drop between cold and warm conditions is recommended. Injector-related codes, such as P0202 and P0203, may also surface, potentially linked to failing injectors or control circuits affecting cylinder 3. Furthermore, warnings from the powertrain control module regarding engine misfires due to poor fuel quality or other malfunctions should be considered, especially when issues persist despite part replacements. A comprehensive diagnostic check is advisable to accurately identify the cause of the ongoing misfire.