Ford F-150 severe misfiring issue after replacing coils and plugs, possible head gasket concern on Ford F-150

Some Ford F-150 owners report experiencing severe misfiring issues even after replacing coils and plugs, which may be attributed to several underlying factors. These issues can stem from damaged or worn spark plugs, spark plug wires, or coils. Additionally, a clogged fuel filter is known to cause engine sputtering and misfiring in Ford trucks, including the F-150. Persistent misfiring after component replacements may indicate a faulty fuel injector contributing to the problem. It's crucial for owners to ensure that spark plugs are gapped correctly at no more than 0.030 inches to avoid misfires that could potentially damage the catalytic converter. Furthermore, some owners note that misfires occurring in overdrive above 45 mph at light throttle may be linked to a faulty coil, which can be diagnosed using a scanner to pinpoint the specific cylinder at fault. If there are concerns about a head gasket issue, a comprehensive diagnostic evaluation by a qualified mechanic is highly recommended to accurately identify and resolve any underlying problems.