i noticed there is this hose that has dropped from the bottom of my car and disconnected from somewhere near the driver side wheel. this hose runs to the other side of the car and down towards the gas tank. it passes the fuel filter and then i lose sight of it when it reaches the back passenger wheel and gas tank. it doesnt leak and car seems to run fine. what might it be?

 

Open the hood and look on the cooling fan for a little Valve with a hose running to it.See if there is 2 hoses connected to it. Do you know where your charchole canister is?