ty1

Hi, there,

I was at a dealer yesterday to have code P0446 checked up. They cannot find anything wrong with the valves , and said there is no vaccum leak. They cleaned the code, and sent me home saying if the ligth comes on again, they will replace the charcoal canister.

On the way home, I tried to fill the near-empty fule tank. It's the first time that it was impossible to fill. The pump kept stopping because of the backlash of the full/air in the filler neck.

When I got home, and check the filler neck from the under, I found a clamp dangling from the rubber-hose of about half-inch diameter with an angled opening. One end of the hose is connected to the charcoal canister.

The clamp was apparently left over by the mechanic.

What is this rubber-hose for, a vent? Where should it go? To the air?

Is it save to drive the car with the clamp off?

Please advice.

Thanks!

300+

Since the dealer fooled with it they should fix it.
If they did not do it maybe you found your problem.
Nothing from the fuel tank should vent to the air on a car since the 60s. Charcoal captures vapors then they are later burned off.
The evap line is off the top of the tank, which may be why you don't see where it goes.
My guess is you could probably find the metal pipe near the edge of tank at the top front.
As a side note the evap vent is a primary reason not to top off.

ty1

Thank you, 300+, for replaying my rubber-hose question.

I found a page on the WEb of the EVAP system. It seems that charcoal caniter has a inlet for fresh air to come into the caniter. Pelase see

http://www.autoshop101.com/forms/h62.pdf

The rubber-hose maybe the air inlet?

300+

If you are looking at the hose on the drivers side of the gas tank where the fuel lines and wires all come down, the largest should be connected by hose between 2 metal tubes. There should be no hose unconnected there. This is what I assumed from your description of where you were looking and that it goes to the canister. Just push it back on to the tube coming down the side of the tank. There are no clamps involved. They may have clamped it to check for leaks so as to not pressurize or collapse the tank.
I still think you should make them fix their own mistakes.
If its not there then I would need a better description of where this hose is. By the canister or tank? Does hose go to the top or bottom of canister?

ty1

300+,

I did not discrib it clearly.

The rubber hose is NOT connected to the canister, neither to the fule tank. The hose is from a valve, and the valve is connected to the canister via two vacume tubes.

The dealer was closed yesterday when I found the clamped hose.

I will go to the dealer tomorrow to have it checked out.

BTW, I drove the car for a while today, with the clamp off and the rubber hose open. The drive was fine, everything felt normal.

Thank you again!