I have issues...but I take lots of pills so others may live. Jack I have never had a pump/ reg hold pressure for week.
this based on your suspicions of pump,battery and alternator
charge battery. check volts across terminals before attempted start say 12.5 volts with fresh charge..... hard wire pump..start engine...engine wont run and cant hear the pump? fuel pump suspect {yes it happens with new pumps too} ive had them die within hours
engine runs....
check when running....look at 13.5 to 14.5 for healthy battery and alternator. IF the volts dont change prerunning of engine. Alternator/ voltage reg is suspect.
if this doesnt solve issue...buy bourbon and get as pissed as I am while writing this ****