Strange hiss from around gas tank

tmueller
Wed, 06 Jan 2010 00:16:23 +0000
Maintenance/Repairs

After 3 hours of trying to find the source of a sound in the garage, I found it coming from in or near the gas tank of our '08 Hyundai Entourage. It only happens in extreme cold after the vehicle has sat for a while. It has the sound of either air release or a faint motor running…the sound is like being on the other side of a wall from where a faucet is run. It lasts from 3-10 seconds…and intervals between can be from 30 seconds - 2 minutes. The best I can come up with is the cannister from the vapor recovery system is somehow turning on and off, perhaps from the extreme cold shrinking metal and gas or whatever. I am certainly no expert, but spoke to two different Hundai technicians who haven’t a clue and thought my idea sounded as good as anything…that’s a lot of help. Any ideas?

4 posts - 3 participants