Here's how to find it:
1. Locate the valve cover: The valve cover is a metal or plastic cover that sits on top of the engine.
2. Look for a small, round, black or blue plastic cap: This cap is the PCV valve. It may have a hose connected to it.
3. Check the passenger side: The PCV valve is usually located on the passenger side of the engine, near the front of the valve cover.
Note:
* It's best to refer to your owner's manual or a repair manual specific to your 2003 Ford Ranger for the exact location and instructions on how to access and replace the PCV valve.
* If you're not comfortable working on your vehicle, it's recommended to take it to a qualified mechanic for service.
Let me know if you have any other questions!