Ok here's the issue i have a supercharged 95 z, the fuel pressure is falling off unfer boost. I put in a new regulator, and pump and still it's galling off to 40 lbs under boost. We are supposed to be leaving for the track tomorrow

 

Need more info on your setup....

What is the fuel pressure set at with the vacuum line off?

What kind of pump, regulator and pressure guage are you using?

Are you still using an FMU?

J

 

The car no longer has a fmu, it has a intank walboro 340 pump, 60 lbs injectors, and a aeromotive fuel pressure regulator with the vacuum straight into the intake port

 

Fuel filter in good shape?

 

Brand new pump, filter, FPR, vaccum line from the fpr to the intake i can't figure it out