http://www.300zx-twinturbo.com/cgi-bin/manual.cgi look through the service manual.
You can find a repair CD on many of the auctions. I paid $10.00 bucks for mine.
Go to DTAmotorsports and download you a free service manual. http://dta-motorsport.com
http://www.thumper300zx.com/z31/vacuum/vacuum.htm
Go to DTAmotorsports and download you a free service manual. http://dta-motorsport.com
Go to this link: http://www.thumper300zx.com/z32/boostleaks/vacuum_hose_guide.htm This should give you all the info you need :)
try ebay, search 1985 300zx for the Nissan Service Manual, I have the 1986 manual , it contains the wiring diagram
autozone
The Nissan shop manual has a complete wiring diagram, they can be found on e-bay.
On a 1992 Nissan 300ZX, the fuel pressure regulator is typically located on the fuel rail, which is mounted on the intake manifold. It is a small cylindrical component connected to the fuel rail with a vacuum line attached to it. To access it, you may need to remove the intake plenum, as it can be somewhat tucked away. Always consult a repair manual for specific details and safety precautions.
If you really want to learn about your z go to eBay and buy you a CD that contains the repair manual. They are cheap. I have one for my 93z and it is great.
Behind the passanger side head light.
http://www.importworkshop.com/files/manuals/nissan/z32-factory-service-manual.pdf