2.0 Fuel Pump questions

[pgeorgeson]

Sorry for the long explanation, but here it is:

I am not getting any output from my fuel pump. There is fuel supply to the pump (into the S port) from the tank and through the filter. I removed the output line ("D" port -- the middle one) and attached a test line feeding the test line into a bottle. When the pump runs, I am not getting any fuel out of my test line from the D port. I can hear it going "pssst, pssst, pssst," but no fuel ever comes out.

In addition, although it isn't sending fuel out of the D port, it seems to be pumping fuel into the return line. The reason I can tell this is that when I removed all the lines from the pump, fuel drained out of the return line where the return line attaches to the R port. After I did my test, I removed the all the lines again (to switch pumps) and quite a bit of fuel again came out of the R line again.

I have a spare pump that I got from the previous owner, and both appear to be doing exactly the same thing.

It seems like both pumps are pumping fuel into the R line instead of the D line. What is going on and how to I fix it or test it?