I just got a adjustable fuel pressure regulator from a friend and it does not have instructions it has 3 outlets one on the top (for the intake manifold). the bottom to the fuel tank. and the one in the middle where does that one go?plus does the gauge have to be attached to the regulator or to the fuel filter. I have a d16a6 1990 crx si .I hope i gave enough information. thanks

 

TTT

 

You should have two parts.
One a gauge, That sits on the filter housing fuel line under it, gauge on top. The second piece goes on your fuel rail, with a vacum hose or fuel return rubber hose on top?.
Search the manufacture of the pieces you have for install instructions. But you should have two pieces, one gauge, one regulator.