One problem related to ignition coil spark plugs has been reported for the 2003 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford F-150 based on all problems reported for the 2003 F-150.
The engine continues to shoot out the spark plugs. This is continued to happen with different cylinders. I’ve had it at the mechanic most of the time I’ve owned it.