Psshiiit ! when opening fuel tank

[vertigone]

Hello Guys !

Nedd your help for this
When i open my tank for fuel refill, I hear a PSSHIIITT like coke can

I can't find the truth about this : some says it's normal other says problem

I ve found schematics about fueltank but I don't know how it would work, is there a kind of "open air" things to avoid pressure in tank ?

hope someone can explain

[bernsaudi]

mine doesn't do that and never has....got to be a blocked breather pipe.

[s2driveruk]

mine has from day one (10yrs ownership)...again not sure if a problem or 'feature' of the car

Certainly doesn't appear to affect anything to do with mechanical operation of the car or fuel circuit, pressure regulator and pump are original etc...

Cheers
David

[veneto rs2]

On my RS2 no pssshhhhiitt of any type....
I do have this kind of noise on the Cabriolet thoug.....and on my old S2 3B I remember the same noise..... also the Cabbie does smell of petrol inside the cabin, the smell disappears when I switch on the engine, any suggestion on this smell problem?


Stefano

[vertigone]

1 vs 1 again
I'm quite worried about tank damage due to pressure inside

[S2central.net]

Vacuum or pressure building in the tank cannot be a good thing... The tank is supposed to breathe - it should vent any fumes via the carbon canister and EVAP solenoid.

[s2driveruk]

i think its pressure to be honest as its higher when the ambient temperature is high

[Rocco]

i think its pressure to be honest as its higher when the ambient temperature is high

+1 me too¡¡ and whem the days are hot more¡¡

i have this "issue" in my car. but normally i never smell petrol inside

i have a new fuel machine in my farm and whem unplug for ad petrol always has pressure ...and the machine has around 1 year,always did it

[Error404]

mine has always done this, nothing has changed since i binned the EVAP line and now vent direct to atmosphere under the rear bumper Dunno if the breather tank thing and rollover protection valve are jammed shut or somthing?

[s2driveruk]

do we all have the same cap i wonder

[vertigone]

what about drilling a little hole in the cap ?

[BLAMM0]

Hello, has anyone found a solution for this? my car also does this sound.

[Colesy]

For the record my S2 and the cabriolet both do this.

[quattrostyle]

Hello, has anyone found a solution for this? my car also does this sound.

why? If everything works as it should I won't be looking for a 'solution' My cabby does it aswell.

[re2500]

My coupe has always done this also. Ive never really given it a thought TBH.