If you live in a State like California that does not have a rolling exemption from smog checks you can find yourself trying to get an older automobile through a new smog check. One of the items that can cause you to fail a smog check is a non functioning purge valve. A purge valve sends collected fumes from the gas tank to the engine to be burnt.
Luckily they are not expensive and easy to replace.
Open the hood and the purge valve and charcoal canister are located on the left side of the radiator in the engine compartment. The charcoal canister just sits inside its bracket and is held in place by friction only. You can just lift it straight out.
The purge valve is connected to the canister by three hoses, two are friction fit and the one going into the canister has a hose clamp. Loosen the hose clamp off the valve and just pull the other two lines off.
Installation is the reverse of removal
This photo illustrates the charcoal canister where it sits in its mount (red arrow) and the location of the purge valve (yellow arrow).