Quote:
Originally Posted by Spuds
So, let's pretend I don't know what vaccum to what regulator you are talking about (it's the internet therefore I really know everything right?  )
Are you saying that the fuel pressure regulator is controlled by some air vaccum line to the manifold? Not familiar with how fueling systems work so sorry if I misunderstood. |
Yup, but I was wrong. Just looked it up. They went to a returnless system before 2008. Oooooops.
I'm pretty sure it also blows holes in Tcoat's theory. The only way to tell for sure is to test fuel pressure real time.
To answer your last question, disabling the pressure regulator would raise rail pressure but not to some crazy unbounded level. It would be the same as when manifold vacuum is lowest - at initial startup and what would be delivered near to full throttle. It would run rich at the low end. Not a showstopper, and would confirm the issue.