Okay, I had the car up on the rack today. The filler pipe, to get around to the centrally located saddle tank, has a bend in it like a kitchen sink drain. This will collect fuel of course. I suppose filler pipes tend to rust more than I would have guessed. Tanks also have more pressure than I would have guessed. We took the plastic shield off and saw some rust, but I hadn't filled it for a long time, and it wasn't actively leaking. On the way home I put a few gallons in and it leaked again. I've never had the filler tube replaced before.
Whaddya say? Do I want to get a new one? Will it be sort of cheap? Easy to do?
If any of you are designing a car, try to get the filler pipe mostly straight down into the tank. I suppose that plastic shield over the pipes is a good thing, but it extended too far under the curved section. I think it collected dirt, which collected water, which promoted corrosion. It looks to me like the air pressure in the tank drove the fuel collected in the bend out a pinhole, which sprayed through the dirt and shield area, so it was much higher up than you'd think, and much stranger than just a drip, which I have now.
As for the EVAP system, it may be behind my stalling, but I can live with a little of that. Leaving a fuel trail like someone in a MadMax movie is what I don't want.
Nils K. Hammer