It has nothing to do with the issue, but just FYI you should not have your boost controller tapped there period. It isnt so bad to have the boost gauge tapped there, but it can slow the responsiveness of the FPR and you dont want that under boost.
If the FPR itself is bad, then it means your fuel pump is overrunning it. When you try to start your car when its warm, you cant because more fuel is injected than what is intended. This happened to my stock FPR, although starting it was never a *huge* problem. Sometimes it just took a little finess
I have no experience with the fuel pressure selenoid though.