Need some specific answers here. Not the general "like ***" comments.

 

The fuel pressure would not rise one psi for each psi of boost pressure. It would stay at a constant 37psi (approx). Nor during idle would it drop down to approx 28-31psi.

Like in full boost the pressure should have risen to approx 47psi at 10lbs of boost. But yours is going to stay at 37psi at 10lbs of boost pressure.

 

Makes sense, how would that effect driveablity?

 

you would potentially run rich at idle, and lean under load...

 

Lean to the pit where the car would stumble and fall on its face? Thats the problem Im having. Car just goes no where once it hits boost.

 

that I don't know, but the FPR vacuum line is one of the only ones left after removing the rats nest and such... so I assume its rather necessary. Why do you want it gone? or if its missing then replace it then see if your problem goes away...

 

i had a problem of my car losing power when boost hit ...

changed/cleaned spark plugs

thats all it took

they were nasty

 

Not potentially, definitely...

Possible depending on boost. The difference between 47psi (correct fuel pressure at 10psi boost) and 37psi (unregulated fuel pressure) is ~12% fuel flow, which is a big change in AFR.