In this case, a PTG-SV, not getting fuel through to the shutoff valve. There is substantial pressure at the return port directly on top of the gear-pump though, , but I haven't been able to fathom where the fuel at that port is supposed to come from. Also, is there a mesh strainer on the SV variant ? I don't actually need the VS function, but it is there, so I have to deal with it. This is a later pump, the one that has 2 springs in the AFC. If I take the AFC piston assy out, I do get fuel there, but still with pressure at the pump-port. If I leave that port open fuel no longer gets to the AFC.