RedTA_DW

For as long as i've owned my car whenever i loosen the gas cap off it depressurizes(makes the same sound as when you open a can of pop.) I was filling up and a buddy if mine that owns a 95 Camaro swears his car never made a sound like that and thinks its bad that the gas tank is building any sort of pressure. I have never given it a second thought, but now i've got the what if syndrom, so is pressure in the gas tank like that a common thing? Or bad?

RyanD

happens to me too, I don't think it's anything to worry about.

er-z

both my 95 z and my 95 3.4 fire chicken do it .

Angelis83LT

it's one of those things thats been around forever. even my 83 and 84 thirdgens do it.. Supposedly there is a one way check valve in the fuel tank that is supposed to vent pressure. when it quits working or gets stuck it no longer vents.

bombebomb

my 94 z28 does it.