I am cleaning up rust from an apparent leaky battery from previous owner/s. When I removed the battery tray there is a white tubing coming out of a black rubber grommet of sorts from the fire wall . The pic shows the lower left corner. The tubing was not attached and rather brittle. I searched a few sites and to no avail a solution. There is also another tubing towards the center of the engine that also is not attached. Any one have any thoughts?

 

Vacuum line I think. Does it idle rough?

 

No it was not idling rough

 

It's the vent tube that connected to the OEM battery. It connected to this weird little reservoir that let any fumes escape out of the engine bay.

 

Escape out of the engine bay through the firewall? I guess I do not need to worry about it?

 

The tube keeps going down to the bottom of the car.

 

Do not believe all you are told, so have a look at this post and see if it matches your car. I think it does.
CLICK
This is the thread the post came from.
CLICK

 

Took the battery out of the Limited to check my previous statement....and I was very much mistaken. You lost so much tubing to the acid! The link onehundred80 provided shows where the other end of that tubing should be. I suggest you get enough tubing to redo the whole line from firewall to the manifold from the looks of all the cracking.