Problem Description and Possible Solution
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: 161,733 (40,000–335,000)
Engines affected: 4.9L 6 Cylinder, 5.4L V8, 5.8L V8, 6.8L V10, 7.5L V8
18 model years affected: 1994
, more1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
49 people reported this problem
After spark plugs were replaced, check engine light came on. Hesitation upon acceleration, and misfires and popping.
Rough running out of the blue, check engine light, valve dropped and fried, spark plug melted, new engine. I will never buy Ford again.
I recently bought my E350 7.5 liter..and it spits black smoke out and idles roughly!Has a hard time getting started! I changed the fuel pressure regulator....still the same .....I'm going to change the ignition coil and the oil next along with the air filter!! Anything else I should check? Vacuum lines seem ok......