To determine the physical location, you need to either:
* Consult a repair manual specific to your 2002 F-150 4.6L: This is the most reliable method. A factory service manual will have detailed diagrams showing the cylinder location and numbering.
* Use a visual inspection: Look at your engine. The cylinders are arranged in a "V" shape. Number 1 is usually at the front on the passenger side (right side in the US). Then, follow the firing order to find the other cylinders. Keep in mind that the order is in firing sequence, not necessarily sequential location.
* Use an online diagram: Search online for "2002 Ford F-150 4.6L V8 engine diagram". Many websites offer diagrams but be careful to make sure it's specifically for your year and engine. Cross-reference with your engine's physical orientation.
In short: Firing order is consistent, physical location needs visual confirmation or a specific repair manual for accuracy.