There is a fuel leak, either with the fuel line or one of the hoses. The car has been sitting for a while, so it's likely that the fuel line or hose has rotted out.
Hi there. Even though your vehicle has been sitting it should not leak gas at any point. A deteriorated fuel line can possibly be your issue. To have this taken care of, a proper diagnosis of the fuel leak from a certified mechanic will be needed to detect the source of the leak. They will be able to replace any fuel hoses if needed.
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