I agree with Nick--fuel vent. the "warm day" is a red herring. Real clues: Uphill (using more fuel) and "3/4 tank" (vacuum pressure growing).
When you open the tank, that "giant sucking sound" isn't Ross Perot or NAFTA, it's a "manual tank vent." Adam PS, better than the mex food thing, anyway. __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com
