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| Feature | Specification |
| Primary Part Number | MOTORCRAFT DY-415 |
| OEM Part Number | E3SZ-8A564-A (Ford/Motorcraft) |
| Function | Ported Vacuum Switch (PVS) (A temperature-sensitive valve that reroutes vacuum signals based on coolant temperature, often controlling the EGR valve or distributor advance) |
| Voltage | Not applicable (Mechanical/Temperature controlled) |
| Ports | 3 Ports (Typically one source, two outputs) |
| Thread Size | 3/8" - 18 Dryseal thread (Common size for mounting into the thermostat housing or intake manifold) |
| Operating Temp. | Varies (Typically calibrated to switch vacuum above or below a specific temperature like 230°F) |
| Construction | Metal Threaded Base with Plastic/Nylon Vacuum Ports |
| Typical Use | Emissions control component used to manage EGR and/or distributor vacuum advance. |
| Vehicle/Truck | Years | Engine Type | Notes |
| Lincoln | 1984 - 1992 | Various Engines | Confirmed OEM or direct replacement fitment for models like Continental and Mark Series. |
| Ford Thunderbird | 1983 - 1988 | V8 5.0L, V6 3.8L | Used in the emissions control system on the mid-sized coupe platform. |
| Mercury Cougar | 1983 - 1988 | V8 5.0L, V6 3.8L | Used in the emissions control system on the mid-sized coupe platform. |
| Ford Passenger Cars | 1983 - 1988 | Various Engines | Used in other Ford sedans and coupes of this era (e.g., LTD, Crown Victoria). |
