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 Challenger has 24 valves.
The 2014 Dodge Charger 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 Journey has 16 valves.
The 2014 Dodge Charger has a V6 engine.
The 2014 Dodge Durango has 24 valves.
The 2014 Dodge Avenger has 16 valves.
The 2014 Dodge Avenger has a 4-speed automatic.