chris8valve, I also have this problem, posted an earlier thread on the subject. I am none the wiser, no sign of a leak from the fuel lines, etc. I am planning to change the fuel filler cap as that is where a very strong fuel smell comes from, very noticeable in warm weather when standing at that side of the car. Do you have a similar strong smell from your filler flap? The smell is worse in the rear of the car so that may be a problem area for me.