Why did air pressure come out of my 92 Buick Regal's gas tank?

  • Thread starter Thread starter Lara
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Lara

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My car started riding rough yesterday, the pick up was bad. I don't know why but I checked the gas cap just to make sure it was on properly and a whole bunch of air came out. Can anyone explain this. Should I be worried and is it dangerous?
 
Are you sure it was air coming out? It sounds like the charcoal canister lines may be unhooked or plugged. If that happens, it creates a vacuum in the tank and when you take off the gas cap, you'll hear an air sound kinda like opening a can of pop. I don't know how you would build up air pressure in there.
 
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