I thought there was a recent thread on this, I looked but could not find a similar problem. In the last few months evertime I get out of my truck while running or after shut down I notice a fairly strong smell of fuel. I have checked everything (I think), it does not leave anything on the ground after being parked. The only residue I can find is around the rear of the valve cover on drivers side. However the residue does not smell like fuel. I do not notice it more or less after filter changes, so I do not think that has anything to do with it, I am very careful not to spill when doing it. The injectors were done at around 50k, now has about 58k on it.