I have a 91 DX hatch and am trying to find out why it wont start.

I need to know how to hook a fuel pressure gauge up to it. I think you do it on the fuel fiilter 6mm bolt.

Can i use any fuel pressure guage, or does it have to have a special fitting to put it on? B/C on my old car there was a schrader valve i hooked it up to and connector seemed a little smaller.

Sorry for the dumb question but I need an answer ASAP.
THANX