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If the PCV nipple (Positive Crankase Ventilation) gets old, the plastic nipple can pop out, and your crankcase fumes will exit to the atmosphere. Smells like gassy, oily exhaust. Maybe that's your culprit.
The part I'm describing is found on the passenger side of the valve cover (very top of engine) on the side facing the passenger cabin. Two large hoses going into it from the throttle body area.
These commonly get old and brittle and break, and/or the rubber gasket it passes through into the valve cover falls apart. Either way it can result in some nasty smelling vapors coming your way, and it's very often overlooked.
I'm hoping that's your issue. Though if it's truly a gasoline smell, it probably isn't. Very inexpensive fix, though, and often left out of the diagnostics so worth mentioning.
posted by 68.195.246...
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