Ford Windstar runs rough after replacing belt, spark plugs, and wires, possible computer issue due to moisture on Ford Windstar

Some Ford Windstar owners report experiencing rough running engines after replacing the belt, spark plugs, and wires, which may be attributed to various factors including potential moisture-related computer issues. These owners have noted that water entering the powertrain control module (PCM) or transaxle vent can lead to engine and transmission driveability problems. Additionally, moisture on ignition components is known to cause misfires, which can result in rough running and possible damage to the catalytic converter. Deteriorating plug wires can further exacerbate these issues, as moisture may cause electricity to jump incorrectly or to ground. Experts suggest that misfiring after replacing ignition components could be due to arcing caused by moisture. Furthermore, neglecting to replace spark plugs after significant mileage can also contribute to rough idle issues. Therefore, it is recommended for owners to inspect ignition components for moisture or damage and consult a qualified technician if problems persist.