Strong smell of fuel 2000 V8

[flatpack]

Hi All
Sometimes I get a strong smell of fuel in the back of the Disco, even on the outside at the rear. I definitely don't have a fuel leak.
I have noticed that when I take the petrol cap off there is a big pressure difference.
Any ideas?

[Road Stone]

I had this a strong smell at the back. First thing to check is your fuel cap. See if the smell is emanating from there.

[flatpack]

I had this a strong smell at the back. First thing to check is your fuel cap. See if the smell is emanating from there.

Definitely not and its got a good seal because when i take the cap off there is pressure, I'm not sure if it's coming out or going in! But I guess it could be related

[bee utey]

If the cap seals well then another part of the breather system is leaking slightly. If there are any holes through the inner panel or floor on the drivers side (eg missing bolts or plastic plugs) then you would easily smell it inside. The pressure in the fuel tank is a continuous evaporation process dependent largely on the temperature, so a slight leak will cause smells. I'd be looking at the hoses to the plastic filler pipe assembly to see if any are cracked. Use a strong torch and a hand mirror to look at the tops of the hoses. The petrol cap has a one way valve that lets air in if fuel usage exceeds evaporation, you can test that by carefully sucking at the centre of the cap underside, once it's aired for a while.