At 05:41 PM 5/16/2012, Scott Daniel - Turbovans wrote: >I can tell you for sure that if you're drivin' along at say 30psi a >light throttle .. >and you open the throttle a lot ..fuel pressure goes up, a few psi. It would have been clearer if I'd said that fuel pressure on your gauge goes up because the manifold pressure has gone up (less vacuum), and the regulator is maintaining a constant pressure difference between the manifold and the fuel rail. That means the pressure difference between the fuel rail and the outside air will be higher. When the fuel pump is running but the engine is not (no vacuum, manifold pressure equals outside air pressure) the reading on your gauge will be the actual pressure that the regulator is constantly maintaining across the injectors. Yours, David |
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