Fuel Hose With Check Valve

[tubman]

Originally Posted by G.M.

You guys should read the Ford service bulletin for checking the pump.
With a gauge in the line between the pump and carb a new, good pump
will hold the pressure for less than 2 minutes before dropping to zero.
Not so great for a new pump. G.M.

I really don't understand what you are trying to tell us. I can tell you (from an experience I had last week) that a flathead will start, back up, and run at least 1000' with just the fuel in the float bowl. If the stock pump doesn't prime by then, I gotta think something else is wrong. What residual pressure at the pump has to do with this is beyond me.