[schumicat]

when I disconnected that outlet line from the WUR and ran the pump (with the FD connected to the WUR inlet) a bunch of gas flowed out of that disconnected return line. So it can't be clogged. I guess that gas was coming from the fuel tank?

Another thing weird is the system pressure is way high, like 90 psi. I took off the pressure valve on the FD and it only had one shim and I removed it, but the pressure is still about 90 psi.

The thing that makes no sense to me is how 90 psi can be going into the WUR inlet and nothing comes out the outlet (with no line connected to it). How can that little metal diaphragm in the WUR seal it so nothing comes out? The only thing I can think of is that my (brand new but cheap) fuel pressure gauge kit has a valve which is not opening (stuck in closed position) so very little fuel is flowing to WUR even in the open position, even though gauge (teed on a line so it is not affected by the valve) shows 90 psi.

Originally Posted by ossiblue

Are you able to blow air through the outlet line of the wur (detached from the wur) which goes back into the tank?