Car wiring diagrams: 03 Ford Expedition Problems, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. The Ford Expedition has problems defects reported by Expedition owners. The worst complaints are engine, accessories interior, .The worst model years for the Ford Expedition are shown below. The Expedition has the most overall problems. It s worth keeping an eye on the .Ignition Coil Failure Due to Excessive Spark Plug Gap. An illuminated Check Engine Light could indicate that one or more of the ignition coils has failed due to .However a company that know they have a problem with their engine and have done nothing to We bought a Ford Expedition with miles on it..