if you smell raw fuel under the hood, it would line of perfectly with a fuel system pinhole leak. it's usually an o-ring or injector or other fitting. if it has a regulator under the hood, these go as well. some FI cars use a "fuel damper" (mazda, toyota, others?) that is a stubby rubber bulb on the end of the fuel rail. these begin to weap fuel with age as well and can cause these symptoms. Any tiny leak will let the pressure drop overnight, resulting in a few extra seconds of cranking to build pressure in the morning.