To find it:
1. Consult a Repair Manual: A repair manual specific to your 1995 Ford Econoline van E-series with the 5.8L engine is your best bet. These manuals have diagrams and precise locations.
2. Visual Inspection: With the engine cool, carefully examine the intake manifold. Look for a sensor with one or two wires connected to it. It's usually a fairly small sensor, often threaded into the intake manifold.
3. Follow the Wiring: If you can locate the wiring harness for the coolant temperature sensor, you can trace the wires back to the sensor itself.
4. Online Forums: Search online forums specific to Ford Econoline vans or V8 engines. Someone may have posted a picture of their CTS location.
Caution: Be careful when working around hot engine components. Allow the engine to cool completely before attempting any inspection or repair.