Where is vacuum line to fuel pressure regulator on 1994 Cadillac Fleetwod brougham?

On a 1994 Cadillac Fleetwood Brougham, the vacuum line to the fuel pressure regulator is typically located on the fuel pressure regulator itself, which is mounted on the fuel rail near the engine. The line usually runs from the intake manifold to the regulator, providing the necessary vacuum for proper fuel pressure regulation. You may need to look closely to find it, as it can be somewhat obscured by other engine components.