Over the past few days I've been noticing a smell of fuel from somewhere near the front of the car. It turns out it was the little rubber hose that runs from the number 2 and number 3 injector that had rubbed against one of the steel lines on the IP and had wore a very tiny hole in the hose and it was spraying a bit of fuel onto the valve cover. I had 4 feet of that hose in my trunk, so I cut a suitable length of hose and replaced the one that was leaking. I probably should do the other ones too.