I would think that leaving it in place (and plumbed) shouldn't do anything, the fuel would just go through it under pressure from your electric pump (before) and pulled from the injection pump (after).
Correct me if I'm wrong.
What electric pump did you use?
~2005 Disco 3 "Moneypenny"
~2008 GTI TSI
~If you can read this, thank a teacher. If you are reading this in English, thank a Veteran.