The 2007 Expedition with the common 5.4-liter V8 uses eight ignition coils—one for each cylinder—delivered via a coil-on-plug system, simplifying ignition wiring and improving spark delivery.
Engine and ignition layout
Ford’s Triton V8 configuration in the 2007 Expedition places an ignition coil on each cylinder. This coil-on-plug (COP) setup means there are eight individual coils mounted directly over the spark plugs, one per cylinder, on both sides of the engine. This design eliminates traditional spark plug wires and central distributor components.
Note on related engines
While some Ford V8s from the same era used coil packs serving multiple cylinders (a wasted-spark arrangement), the eight-cylinder 5.4L engine in the 2007 Expedition specifically uses eight individual COP coils—one for each cylinder.
Maintenance and diagnostics
Diagnosing ignition issues typically involves testing each coil individually. With eight separate coils, a misfire or ignition fault can often be traced directly to a specific cylinder and its corresponding coil.
Bottom line
Eight ignition coils—one for each cylinder—for the 2007 Ford Expedition’s eight-cylinder 5.4L V8 engine.
Summary
In short, the 2007 Ford Expedition uses eight ignition coils in a coil-on-plug arrangement, aligning with its eight-cylinder 5.4L Triton V8 configuration. This setup provides per-cylinder ignition control and reduces wiring complexity compared to older distributor-based systems.