Hello, i think my gas tank ventilation isnt working right. when i open my gas cap up it makes a nice hissing noise, there is definately a descent amount of pressure in there. is that normal or do i have to start looking into this. thanks -dave

 

Mine did the same thing, I paid no attention to it, Cause I've had it do it on other cars too.. unless all my gas tanks got issues lol

 

The lower the fuel level, the more it hisses when you open it. That has been my observation and appears to be perfectly normal.

 

cool, thanks for the info -dave