Thread indicates 5.0 but its actually a 4.6....sorry
1997 F150 4.6 started missing. Codes issued were a 304 and 308 (cylinder 4 and 8 miss) plus got a code 401 (EGR low flow). Changed plugs and wires (Autolites) and still getting code 308 (cyl 8 miss). Replaced coil pack for even numbered cylinders still missing. This miss started suddenly. Starting to think it maybe mechanical rather than electrical. The code 401 is also still with me.....any suggestions. Could a vacuum leak be suspect? Fuel filter or possibly injectors? Hate replacing everything.