fuel pressure and regulation

[f85gtron]

I suspect my fuel pressure regulator is failed, had failed, is frozen. I'm running pig-rich, hooked up the winaldl, cts and mat are good. O2 int is around 152+ and the map is reading good. No codes set, but am getting a lot of rich flags.  I haven't made my weekly trip harbor freight either to pick up a fuel pressure tester yet.   I haven't measured vacuum at the fuel pressure regulator yet because my wife is watching me closely and i can't get in and out before she notices, so I'll have to do that tomorrow.
It's been rich since day one, but now it's obscene because the cat is missing. I suspect it's as a result of a high flow 255 fuel pump that the manufacturer sent me after sending me three bum pumps in a row and threatening a return for refund.....
I usually run about 15# vacuum. Is that normal?
What can i do to change the pressure, assuming the fuel pressure regulator is good. I've read about adding a penny to the spring, but what about decreasing pressure?  File down the spring? 
Any adjustable regulators that are mo' better?
Ron
edited to fix elementary spelling errors and sentence structure.

[Fierofool]

Refresh us on the fuel system.  HP fuel pump, but how about the injectors?  What are they?  Stock? 

Overpressure should go back to the tank via the return line. 

[f85gtron]

It's got rebuilt injectors that have been rated and balanced to 16.2 lbs.
I snuck out with my son and pumped down the regulator with a vacuum tester and it appeared to be slowly leaking down. I then "manually" applied vacuum and tasted gasoline vapors, but didn't get a mouthful of gas, so i guess it's time to change the regulator out.
I have hard starts when warmed up, so i suppose the writings on the wall.
I still haven't checked fuel pressure yet.

[Fierofool]

So that's what that device is for.  I always thought it was for getting boogers out of my little grand daughter's nose. 

I have a good fuel rail with regulator that I can bring along if you want. 

[f85gtron]

Sure wouldn't hurt. I've got a duke sitting here. Do you want any parts in trade? (Other than door hinges and that plastic piece that covers the aldl connector.....those are spoken for)

[f85gtron]

Fierofool, thanks for the rail!  I took my rail off and energized the pump, no leaks from the injectors.  Good. I took off the old regulator.  Bad. It had a chunk of something rubber, like a gasket or oring. I guess that explains the low pressure. I went ahead and replaced the regulator with the one Fierofool supplied and its good as gold.

[Fierofool]

If you still have the old rail, would you bring it to me at the picnic?  The other rail I had in the box is a Camaro rail that uses the same regulator.  I can pull it and put it in your old Fiero rail or use the Camaro rail if I ever get around to doing my 7730 swap. 

[f85gtron]

Sure. I'll bring it.