The Check Engine Light may illuminate, the engine may run rough and have misfires on acceleration. Commonly the ignition coils and/or the ignition coil boots are the cause of this problem. The rubber boot that insulates the coil to the spark plug can dry and crack allowing arcing. Inspect the coils and boots, and replace them as needed. Our technicians also recommend replacing the coil boots any time the spark plugs are replaced.
Average mileage: 165,533 (40,000–335,000)
Engines affected: 4.9L 6 Cylinder, 5.4L V8, 5.8L V8, 6.8L V10, 7.5L V8
47 people reported this problem
Viewing 1 - 9 of 9 comments
After spark plugs were replaced, check engine light came on. Hesitation upon acceleration, and misfires and popping.
bucking while going up hill with a trailer and theres no check engine light
Will run ruff untill warmed up misseswhen ideling missed when running at a study speed does not miss on exceluation. It FL
Rough running out of the blue, check engine light, valve dropped and fried, spark plug melted, new engine. I will never buy Ford again.
miss fire, new plugs and two new coils
Runs rough going up hills. Its my first engine problem. I got me a good V10.
Wont start replaced the starter
Flashing check orange check engine problem. Uneven engine run. Loss of power during acceleration.
I have this problem