problem with fuel pres. and boost gauges

I have a Cyberdyne digital fuel pressure gauge and a Nordskog analog boost gauge in my turbo 92 Sentra SE-R. The fuel pres. gauge reads high and the boost gauge stays at 1 psi. I had used thread sealant on the sending units before until I realized you are not supposed to so I cleaned them off. I also have them grounded to the engine like the companies tell you to also. I have the ground wires with blade terminals on the ends that go to the sending units and have hose clamps around the bodies of the sending units and the blade terminals between them. I was never clear on how to ground them. This might be the problem. Can any one provide some insight as to why my gauges are not working correctly?

I can't really comment on the digital fuel pressure gauge. But this may help:

http://www.stealth316.com/2-fp_install.htm

However boost gauges are pretty simple in theory.

1) I don't know how much boost you are running, but incorrect readings can also be caused by boost/vacuum leaks. So pressure test everything on a regular basis to make sure you are getting accurate readings and not overworking your turbos trying to pressurize the entire atmosphere.

2) Again I don't know your setup, but you want to find a place where you can run a vacuum line from that is pressurized ( I used the back of my intake plenum) Just cut a previously existing hose, put in a 'T', and run another hose to the back of your gauge. Make sure these connections are tight and sealed...I have used silicone sealant if memory serves me correct. Also really make sure you have a quality rubber hose...my first time I used that cheap thin plastic Autometer hosing...and it sucked!
Also make sure the line isn't pinched when running through your engine bay/firewall/dash as this can cause inaccurate readings.

2) Analog gauges should read pressure without being electronically connected. Generally the terminals/wires are only for a background light, but with mine I tapped into a 12 volt switch for power, I used the lights, so that the light on my boost gauge only comes on when my headlights are turned on. And then for a ground I just ran a wire down to a bolt connected to the frame.
This site may help:

http://www.stealth316.com/2-wiring-tips.htm

Sorry that the pages aren't related directly to your car, but hopefully they help.

Thankyou so much for that. I have the hose from the boost gauge teed into the vacuum line that goes to the fuel pressure regulator. I was informed this was the way to do it. But it also might be the problem.

The gauges are both electrical. I realized that I had grounded the gauges some ground wires that were behind the dash for the stereo I think. Thats what I thought the problem was, and I realize that was stupid. Only after reading the online instructions from the manufacturer's websites did I recognize that they are supposed to be grounded to the engine. Well, I regrounded the gauges to the engine, same results. What the hell is going on here? The fuel pressure gauge still reads high and the boost gauge stays pegged at one PSI and does not move. I have been told that you have to ground the sending units, so I did that in the first place. The only way I could do that was to put a metal hose clamp around the sending units and then use wire to connect them to the engine for a ground. That part was never really clear to me.