It sounds like there is a problem with the EVAP system. There is a large leak. What I suggest is this. Take the vehicle to a shop and have them fog the EVAP system. THey will actually place fog in the system to determine where the leak is. Otherwise you could be looking for a long time and not find it.
Do that and let me know what you find.
Joe
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Friday, January 22nd, 2010 AT 10:38 PM