Where is 8 cylinder on a 5.4?
A 5.4L engine typically has a V8 configuration. Therefore, there isn't an "8th cylinder" in the sense of a single cylinder numbered 8; it's one of the eight cylinders arranged in a V-shape. The precise location relative to the others depends on the specific engine's design and the numbering system used by the manufacturer (which can vary). You'd need to consult a diagram or manual specific to your 5.4L engine (make, model, and year of vehicle will help identify the correct diagram).