Has anyone added / used a carbon canister to vent the gas tank and did you find any benefit?
On my last Cougar, the garage had a slight gas smell as car was parked. I assume this was from gas tank venting or potentially fuel evaporating from carb. The rubber for the fuel line & gas tank neck can probably contribute and need to be checked/replaced if needed.
Hi @Cheese I thought I’d chime in I was smelling gas and did some digging and found that my 69 Cougar fuel line had a leak were it ran through the torque box. Just thought if you hadn’t found the smell that would be a good place to look. Good luck.
No leaks / cracks in any of the rubber lines. My thought was the smell coming from either the gas tank vented cap or carb….or both.
I only brought up potential use of the carbon canister for a tank vent as I’ve seen it pop up on my Facebook feed and on some of the FI installs.
As mentioned, this was for a past car and was curious if anyone here has tried a carbon canister.
No leaks is a good thing I only mentioned it because I was smelling gas changed all the lines and still smelled gas on mine and it turned out to be the line running through the torque box. I have just finished installing new torque box’s that’s how I found it. I do not get an any smell from around the gas tank thankfully.
Is your garage well-ventilated?
It could also be bad gas. The newer fuels with Ethanol don’t last very long in a storage situation, they attract moisture, and they are very bad for rubber hoses along the fuel lines.
Nope…fresh gas, and typically use the Ethanol free version.
If you have the correct gas cap there should be no appreciable fumes. The cap only allows air into the tank not out. I typically find tiny hidden leaks. One of my favorites is the accelerator pump under the front bowl. You probably won’t find liquid gas, just a funny looking stain.
When the new car arrives, I have a carb reseal kit as I’ll probably need to rejet due to altitude anyways. Hopefully I don’t have this issue with the new car, but still worthwhile to check out the fuel lines / rubber.
In the end, it appears carbon canister are in limited use.