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.Google+
Car Problem Reports
Ford E-350 Rough Running Engine and Possible Check Engine Light
Ford E-350 Problem
Engines Affected: 5.4L V8, 6.8L V10, 7.5L V8
Average Mileage: 131,285 mi (40,000 mi - 200,000 mi)
Visitor, 1999 Ford E-350, 5.4L V8, 200,000 mi
bucking while going up hill with a trailer and theres no check engine light
Visitor, 1998 Ford E-350, 6.8L V10, 144,000 mi
After spark plugs were replaced, check engine light came on. Hesitation upon acceleration, and misfires and popping.
Visitor, 2002 Ford E-350, 5.4L V8, 150,000 mi
I have this problem
Visitor, 1994 Ford E-350, 7.5L V8, 128,000 mi
Will run ruff untill warmed up misseswhen ideling missed when running at a study speed does not miss on exceluation. It FL
Visitor, 2007 Ford E-350, 5.4L V8, 40,000 mi
Rough running out of the blue, check engine light, valve dropped and fried, spark plug melted, new engine. I will never buy Ford again.