Where is the 2 cylinder on A 1999 ford F-150 5.4 engine?

The 1999 Ford F-150 5.4L engine is a V8, not a 2-cylinder engine. Therefore, there's no "cylinder 2" in the traditional sense of a 2-cylinder engine.

If you're trying to locate a specific cylinder on the V8, you'll need to refer to a diagram of the engine. Cylinder numbering varies slightly depending on the specific engine variant and how it's oriented in the vehicle, but generally, cylinders are numbered sequentially from one side of the V to the other.