hey guys am getting 43psi of fuel pressure with vac on, but when the pressure is around 60-65psi with the vac off does that mean i have a fuel leak somewhere and by the way after 15 mins of engine idle i can notice the fuel pressure went down to 41.5 ...even though a i dont see any leak around the connectors! does that mean i have a minor fuel leak at my fuel pump where that small hose fits to the fuel cap?

any similar problems you guys experienced?