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Two common sources of gas fumes in these cars are the fuel rail and the rubber hose connecting the fuel filler neck to the gas tank. If it's the hose to the tank, you'll see a puddle of fuel directly under the center of the rear axle when you top the tank.
If it's the fuel rail, you can see the gasoline leaking from the end cap. This could be tricky to diagnose, as it will typically leak only when first starting the engine. As the engine warms up, heat expansion of the parts can seal the leak. So you should look for it with a cold engine on startup. The fix is to replace the fuel rail, although some on this board have reported acceptable results with a repair of just the end cap. Because of the potential consequences of having fuel vapors in a hot engine compartment, I would strongly consider replacing the entire fuel rail. The replacement part has a modified design to correct the original design flaw.
Does your fuel smell occur only on startup when it idles for a few minutes, or does it occur at idle even after the engine is at operating temperature?
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