* Most commonly, they're numbered sequentially from front to back, on either side of the engine. So, cylinder #1 would be at the front on one side, and then it would go 2, 3... etc., to the rear on that side, then back to the front on the other side and continue to the rear.
* The specific order can vary slightly depending on the engine configuration (V6, V8, etc.) and the year of the truck.
To know the precise cylinder numbering for *your* specific Ford F-150, you need to:
1. Consult your owner's manual: This is the most reliable source.
2. Look at the engine itself: Some engines have the cylinder numbers cast directly onto the engine block or valve covers.
3. Use a repair manual specific to your truck's year and engine: These manuals will show detailed diagrams.
Without knowing the year and engine type of your F-150, it's impossible to give you a definitive answer.
