Re: 2003 Ford Expedition CEL Multiple Codes and Misfire
Swap the coils and see if it changes cyls ?
Common Symptoms of a BAD
Ford Coil-on-Plug Ignition Coils
This is not the most definitive list on the subject, but does cover the majority of symptoms I've seen on this type of Ignition System:
1.Misfire Codes that light up the CHECK ENGINE LIGHT (CEL) on your Instrument Cluster.
2.Misfire Codes: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308.
3.Engine Misfire that DOES NOT light up the CHECK ENGINE LIGHT (CEL).
4.Smell of unburned gasoline coming out of the tailpipe.
5.Rotten egg smell coming out of the tailpipe. This is due to the unburned gasoline from the misfiring cylinder over loading the catalytic converter.
6.Really BAD gas mileage.
7.Lack of power as you accelerate the vehicle down the road.