1997 Procharged 502 EFI, At an idle my fuel pressure recently started jumping between 38 to 42 lbs. I am running the Pro charger boost referenced regulator and an Aeromotive fuel pump.
This set-up has ran great on the boat for years. I am thinking my problem could be a clogged vacuum line or junk in the fuel tank? I have not ran the engine above idle since this problem has started. Any suggestions?
Also does anyone know of a direct replacement for the Procharger boost referenced regulator? I know there better ways to do this nowadays but I am not looking to redo my fuel system at this time.

Replace the vac line to the boost controlled regulator......could have a piece of crap in it, or the inside could be flagging......

Thanks Commandersander that was kinda what I was thinking too.
Ive been researching Bell fuel regulators. Does anyone have any experience with them?

aeromotive makes a nice boost referenced regulator,the one pro charger supplys is known to be a problem.i agree with commanders post,change to the aeromotive regulator and replace the vac/pressure hose.

Thank you for the help Mike