fuel pressure regulator question

What happens if you do not hook a vacuum line to the fuel pressure regulator? Will it still work?

cooter wrote:What happens if you do not hook a vacuum line to the fuel pressure regulator? Will it still work?

It will work but, bot the way it is supposed to work.
The vacuum line on a fuel pressure regular is there to always keep the fuel pressure drop across a fuel injector the same because one side of the injector sees manifold vacuum.
With a carburetor, that line should simply be atmospheric pressure.

thanks randy