Fuel pressure regulator

Car cranks for ten to thirty seconds with pedal down before turning over. Takes longer when engine is cold but still cranks for five to ten seconds if warm as well, just turns over quicker. Car runs totally fine once started. Battery checked and read good but needs charging but still did it after driving around for twenty minutes to build up a charge. Leaning toward the pressure regulator but cannot seem to find a good diagram to be sure of the location. Do most of my own repairs but learning as I go. Does anyone have a better diagram or instructions on where the fuel rod is and the regulator? I feel like I see the rod but half of it is under the manifold. Do I need to remove the manifold to access it? Also, if you have an additional thought on what it could be much appreciated.
Other symptom happening but may not be related is engine pulses while decelerating.