Ford Explorer recurring misfire issue after multiple coil replacements on Ford Explorer

Some Ford Explorer owners report experiencing recurring misfire issues even after multiple coil replacements. These misfires, particularly when affecting multiple cylinders, may indicate a problem with the coil pack rather than injectors. Additionally, vacuum leaks from large hoses or the intake manifold gasket are known to cause misfires, especially at idle, with plastic intake manifold gaskets in Ford engines like the 4.6 and 5.4L being common culprits. Other potential causes could include issues in the valve train, head gasket, or injectors. Many owners find it beneficial to seek professional testing and repair from skilled mechanics equipped to diagnose the issue accurately, as they can identify problematic components and perform necessary replacements. In some cases, specialized repair services may be considered for testing and repairing original parts, including the Powertrain Control Module (PCM). Furthermore, having a machinist inspect the cylinder heads for cracks and replacing damaged valves may also be necessary to resolve the issue effectively.