However, be absolutely certain before you start working: Engines can vary slightly in details even within the same model year. To be absolutely positive, it's best to:
1. Consult a repair manual: A Haynes or Chilton manual specific to your 1994 Ford Ranger 2.3L will have diagrams showing the exact location. This is the most reliable method.
2. Use a parts diagram: Look up your vehicle's parts diagram online (using the VIN is ideal). Many auto parts websites offer this service.
Working on your engine can be dangerous. If you're not comfortable doing this yourself, it's best to take your vehicle to a qualified mechanic.