On a 1994 Ford Ranger 4.0L engine, the crankshaft position sensor (CKP sensor) is located on the passenger side (right side) of the engine block, near the front of the engine, and typically points towards the front of the vehicle. It's usually mounted on the engine block itself, close to the crankshaft pulley. You'll likely see a single-wire connector plugged into it.
However, precise location can vary slightly depending on specific engine configuration. It's best to consult a repair manual specific to your 1994 Ford Ranger 4.0L to get the exact location with diagrams. A Chilton's or Haynes manual would be a good resource. You can also usually find diagrams online through sites selling repair manuals or parts.
