Um, not quite sure what you mean, but this is how it worls. Fuel reg is closed nd not letting fuel into the fuel rail when the engine is off. When at idle, there is vacuum pulling on the diaphram causing fuel to flow through the fuel rail. When you push on the gas pedal, it revs the engine up causing more vacuum to pull on the diaphram letting more fuel into the fuel rail.
The vacuum pulling the fuel press reg has nothing to do with the reg itself, it is based on enigine speed and any vaucum leaks you might have in the intake.
Tuesday, May 29th, 2007 AT 12:26 AM