fuel tank bubbling

[vt com]

gday guys and girls

my mother in law has a vl and recently the fuel tank has been making a bubbling sound. then when releasing the fuel cap it also has a lot of pressure built up in the tank. the fuel hoses have been reoplaced around 2-3months ago by a family member.

I suspect that some of the hoses may be wrong, does anyone have a pic of the fuel system that they could send me or a link to where I could get detailed pics of the tank and where the hoses should go. Also any suggestions of what you think it may be.

Thanks heaps
Jason

PS I have searched but could not find what I as looking for.

[Sabby]

theres a line that goes from the engine back the fuel pump so that it always covers the fuel pump. you could have air in the line going back therefor making a straw sucking kind of noise inside the tank, is that what it sound likes?
ide say just take it to the mechanic.

[rb26dett]

Sounds like a fuel pump may be on its way out.

[harry3]

theres an evaporation hose system that can be looked at by removing the flap behind the tyre near the fuel cap, this hose eventually often rots