A more direct question about the fuel system

[Tigran Varosyan]

Here is a more direct question about the fuel system....

I just got a fuel pressure tester. From past experiances with cars I think
that this may be a fuel pressure problem. But I am still confused on how
fuel pressure works on our cars ('85 4000sq). Going into the fuel regulator
I have 110+PSI. However, I read in my book and online that operating
pressure should be 75 PSI. Where can I mesure that? What other stuff can I
mesure for pressure and what numbers shouls I see?

Thanks,

Tyson