Ive got a 92 blazer with the 5.7L engine and need help identifying a part. This is a canister in front of the drivers side wheel well with two lines running to it.

One line is a rubber line that conects to this canister and runs to the base of the throttle body. On the canister next to this connection it says "purge"

The other line is metal and runs back towards the firewall. On the canister next to this connection it says "air cleaner tank."

The reason i ask is the metal line is disconnected from this canister. The fitting that attched it to the canister either fell off or something ate it off. I'm wondering if this could be causing some of my rough/high idle issues at start up.