What Would Your Fuel Pressure Be With The Fuel Pressure Regulator Deleted?

[Scott Black]

Ok, Basically the stock fuel pressure reg has a outlet size very similar to inlet size, inside the reg is a valve controled by a spring, this spring has a set pressure, when the fuel pressure is below the desired level the valve closes and pressure increases to the point there is enough pressure to push the spring open, as the outlet and inlet are very similar sizes it basically means if you can push it into the reg it can flow out of it, so the reg wont be overrun unless you have stupidly big pumps with upgraded bigger fuel lines and an upgraded fuel rail,

the only other part to the reg is the vacum diaghpham that varys how much pressure the spring needs to move related to vacume and boost so the fuel pressure stays at a set level compaired to manifold pressure.

so unless the internals of the reg are stuffed, and the fact you have tried a few means this wont be the issue id say you have a restriction in the return line somewhere, or a faulty pressure gauge, how are you hooking up your fuel pressure gauge?
besides blowing into the return line, try putting a fuel presure gauge inline with the outlet of the fuel pressure reg, if you get a pressure reading there, then you know you have a restriction there.

[iruvyouskyrine]

Have you blown back through the return line yet?