[12Ounce]

The fuel system is pressurized @ 45 psi or so ... and would be even higher if the fuel pressure regulator is acting up. The fuel pump is in the tank ... and the tank has a vapour recovery system, so you've got a problem of sorts. Most add-on pumps will handle only a lb or two of inlet pressure before they rupture.

Having said that, I will mention that I have "stolen" pressurized fuel from my Windstar to fuel-up other auto's fuel rails to clean the injectors ...the fuel rail being placed in a metal bucket. This involved removing the valve-core from the Schraeder test valve on the Windstar's fuel rail, and running a 30ft fuel hose across the lawn to the cleaning process. The fuel relay was jumpered. Very risky. The injectors were fired with brief pulses of 12v. I was aware of the fire potential, but the method worked very well. Of course, this all has nothing to do with your question.

I think I would recommend a separate fuel supply.