If it's a small EVAP leak they can be hard to pin point. A smoke test is usually done to find the source but there's no telling how long it takes and what the cause is and what part(s) are involved until a diagnoses has been done. Large leaks are much easier to find.
The purge valve is component to a vehicle's evaporative emissions system. For a 2003 Ford Ranger with the 2.3L L4 the vapor canister purge valve is Motorcraft part# CX2127. As of 2014 the wholesale cost for this part number is around 60$.
They are not interchangeable. The 2014 transmission is fully computer controlled, the 2001 uses a completely different system.
The 2014 Dodge Charger has a V6 engine.
The 2014 Dodge Journey has 16 valves.
The 2014 Dodge Avenger has 16 valves.
The 2014 Dodge Durango has 24 valves.
The 2014 Dodge Challenger has 24 valves.
The 2014 Dodge Challenger has a V6 engine.
The 2014 Dodge Durango has a V6 engine.
The 2014 Dodge Dart has 16 valves.
The 2014 Dodge Charger has 24 valves.
The 2014 Dodge Challenger has a 5-speed automatic.