draining vst 2009 f115. pls. clarify

[Capt. John Deering]

apparently there is suppose to be a black or plastic tube that you need to locate in oreder to drain the vst.

i did locate a flat brass screw (that was hidden well too) that looks like a drain, which i did loosen. i don't want to remove it completely because i don't think i could get it back in with removing the intake manifold. a very small amount of gas came out.

i also released pressure at the shrader valve

anybody have additional details, pictures would be great.

[rodbolt17]

the schrader valve at the fuel rail isnt the one you need.
look between the intake runners,you will see a small black rubber cap. remove that cap and depress that valve stem.
thats the VST vent.
no need to remove the drain screw just back it off a couple turns.
if air cannot get in fuel will not drain out.
simple law of physics.

[aerostruct]

I had the same issue on my 2007 F115.

I actually unscrewed the brass screw all the way out and it was a pain to first retrieve and then reinstall. You can only unscrew the brass screw one to two full turns before it begins to come out.

I found and removed the black rubber cap, loosened the brass screw(vapor separator drain screw), and depressed the shrader valve and the fuel started flowing. As the manual states, use a rag under the brass screw to absorb the fuel.