Hey guys, first post, here we go.

Bought my first car, Uno 1.1 i.e.s -94, sweet, but one problem occurred with the fuel tank.

It seems the tank doesen't breathe at all. At first it was just some minor pressure/vacuum, which resolved as i opened the cap, but now it's worse.

You see i filled the tank on a cold day, more then ten minusdegrees celcius.
So, the day after, sun shined directly to the car and it was some 5 degrees warm, so i (don't remember why tho) opened the cap and got showered with gasoline. Reflexively i closed the cap of course. Right now there is immense pressure in the fuel tank, and i'm pretty sure that's not good for it. A vacuum would be much worse tho, since it could suck the plastic tank right in, right?

Should i check a possible breather hose or something? Is there one?

Finland is hella cold at winter so it's possible something _could_ be frozen shut, but unlikely, since the car has of course been warmed more then enough times to completely melt.

So how the hell do i fix this?

Plan B is that i drill a miniature hole thru the plastic cap. I'd prefer not to, tho.

Hello Finland.

I´m pretty sure you have a metal tank. I´ve also got a 1.1 i.e.S (93/94) The breather hose is propably the cause.

Morten.

That so. well that's a sorta relief. The haynes manual said, or i thought it did, that the newer models have a plastic one. But i trust you more anyway.

I'm gonna crawl under the lil thing and see if it looks anything like it does in the manual.

Hei.

I´m certain the tank is made from steel. I had to change it due to corrotion. Propably hit something that made the tank rust. Had a lovely smell of petrol every time I picked up the car in the morning...

About the Haynes manual. Where it refers to "new model" it is not as new as yours. You should read the complete book, because there are excerpts of interesting themes scattered around. Especially the additional chapters in the back will provide some nice information about the 1108 engine. If the manual refers to the 999 engine it is ok, because the cars with these engines are just the same except the length of the piston stroke (or something similiar).

Check if your fuel filter is clogged. It is cheap (un-original) and very easy to change. It is mounted in the engine bay, looking down in the engine to your left side. Looks like a 25 cl coke-can. As far as I remembemer it is mounted with a bracket on the suspension strut on the passenger side (since you drive in the same side of the road as me...).

Morten.

Yeah, i gotta study that manual more.

Located the filter, didn't bother to open it up right now cause i froze my arse off looking for anomalies on the breathing hose. Found some snow(!) on the open end. could be just a coincidence, since it ends just over the rear tire (if i followed the right hose, that is). it can't have condensated itself full of snow and ice, can it?

Anyways i'll look into it at another time, maybe wait for a warmer day so it could be - in theory - easier to fix. If there indeed is a crapload of water/snow/ice/ in the hose i want to look at it when it's in liquid form.

Plus my head is too big to fit under the rear of the car, so i'll have to figure a way. Drive over a ditch or something. I'll just keep letting the pressure in/out after each drive until it gets warmer.

Hi! I have the same problem! Can you please indicate where is the fuel tank breather?

I Think the valve is ontop of the tank and i am not sure if you can get to it with out removing the tank.

I am sure someone else will confirm.

Tank has to come out to get to it.

Depends which Uno

Thats the case for the Turbo, but for single point injection there are a couple of tubes leading back up to near the filler. IIR the vent is inside the wheel arch on the 1.0ie uno . it's quite a lump and it's harder than removing the tank if you need to remove the placitc retaining clips around the fuel cap - without braking them.. you'll need 3 or 4 hands.

maybe jetwash the area?