I notice when I take the gas cap off I have pressure coming out of the tank. I found the metal line under the hood that has a 90 degree turn up that A hose that used to go to the charcoal canister when to and I tried blowing air through it and I could not blow air through it. Does it have a one way check valve? Maybe that is why I cant blow through it but it should vent I would think. Just trying to find out why it is not venting.