You may be smelling fumes from the charcoal canister, under the driver side fender. It may be saturated with raw gas. That's one thing to check. The canister can be replaced, if needed.
Are you sure the fumes are coming from under the hood? A leak at the rear of the car will smell just as bad as one in the front. Check ALL of the lines going to/from the fuel tank, both on the driver side and passenger side of the car. The lines on the driver side are the fuel vapor lines...they go to/from the fuel tank to the canister. A leak in any of those hoses will give you a raw fuel smell, also.
If yo are seeing raw fuel puddling in the intake after shutting the engine down, your float level may be too high, or the car is getting so hot the fuel is percolating in the bowl, and running out into the intake.
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Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
