I have a 97 Dodge Dak 5.2 and i noticed that the cap/vent on the evap line coming from the canister on the frame rail fell off while i must of been driving and tripped the sensor. I can't seem to find a replacement as i do not know what the real name for it is.. It is located right below the fire wall in the engine compartment. Any help would be appreciated.

 

Would you be talking about the leak detection pump or the selnoid valve?

 

You should be able to find one at a junk yard or any generic cap will work on any vehichle. On our models the AC connectors are all the same size.. You have High Pressure Side (You never hook up too unless you know what your doing and have the correct Gauge) and low pressure side.. This is where you would hook up one of those refill cans too.

Both of those 2 connectors are the same size and you can rob any Car/Truck for it's cap.. they are universal size. Kinda like OBDII connector.. they are Industry Standard Size.

 

below the fire wall or in front of the fire wall? big difference. take a pic if you can.