I've got a XP fuel pump, and I'm not sure if I'm having fuel pump issues, guage issues, or what. I've noticed that after driving around for a while my fuel pressure guage begins to read 5-6 psi lower than when it's only been running for a short time. Is that normal or do I have a problem somewhere? I have an autometer hood mounted fuel pressure guage, so I tend to watch it a lot 
