I doubt it is your FPR, if you want to test it just remove the vacuum hose from the FPR, and wait a minute or two to see if fuel comes out of it.
Here is a video if you want to check it out.
I am with Justin on the culprit, the o-rings for the rear fuel line on my 96' PA started leaking, I could easily press down on the connector when the key was on, and fuel would squirt out of it onto the intake manifold and fuel rail.
Give this connector a little push down when your key is set to ON, and see if any fuel squirts out, if it does the o-rings will need to be replaced, and that job was not easy for me, the o-rings are easy to remove with a pick, but finding the correct o-rings took me a while, and when I did find them, I could not get the inner most one to seat, so I got a Dorman fuel line repair kit that has the o-rings installed, and I tried to cut the line, and repair it, but I learned the fuel line tool I bought could not crimp onto a curved line, so in the end I just bought some fuel injector hose, and a clamp, then I removed the plastic hold down clip from the fuel rail, and ran the hose from there back to the passenger side firewall, where the nylon fuel line meets the metal fuel lines.
I'll see if I can find the part number that I found that was actually the right o rings if you want to tackle the job yourself.
I tried to ask a local dealership about buying the o-rings, or replacing them for me, but they said they would have to replace the whole fuel line, because you cannot safely replace the o-rings, so they would not sell me the o-rings, I guess they just wanted to make more money, because I have heard of others that were able to replace theirs.
Here is a pic of mine when it was occasionally leaking, I expect it was doing so when I'd hit bumps in the road..