I've checked every where for the fuel leak. I know that the fuel is dripping by the starter and bell housing, but there is no fuel in the valley what so ever. I've checked the back passenger fuel line as well, and nothing. I've read some forums that they were saying the mechanical fuel pump, but doesn't leak in the valley, could it be something internally in the block. I've heard that the the injection pump ring can rot , but i don't have no clue. ? I've spent days to trying to figure out where its coming from. I own a 1995 turbo Diesel F250, just recently got it, i also notice it trembles at idle when im at a light not to hard but a bit, like if its barley receiving fuel , then it shakes at start up then a couple sec, it will idle normal on P.

 

I believe that there are fuel return lines that come out of the back of the heads? I know that the here are two on the front that rot out. I was understanding that there is one on each side in the back. That is where i would look. I have never looked back there for them though. I cant look now as its dark, but will look tomorrow.

 

Under the downpipe there is a return line that has a small special washer. They get saturated over time and leak. If your lucky you can get them from a dealership otherwise clay at riff raff should have them or diesel o-rings. I'd start with that. I don't think there is a plug that comes out on the back of he head. That's about the only place it could come from if you don't have oil in the valley