Fuel pressure reg question

[bobbo]

If I pull my vacuum hose off of my regulater nothing happens at all. Is this normal? What should I be seeing for a vacuum at the reg?
Thanks!

[christ.deyoung]

Fuel pressure should be 43 psi when unplugged (no vac), and 36 psi during idle.

[bobbo]

Interesting. I expected to see a change when removing the vacuum line from the FPR. Perhaps the fuel pressure isn't enough to change the idle. I'll check my a/f when I unplug it.
Thanks for th reply.

Rob

[modularturbo]

The vac/boost signal is required for correct Delta fuel pressure.
If you pull off the vac line, then you are adding fuel pressure to the system, your AFR's may or may not change. It depends on if the ECU decides to trim it out. A stock ECU will do this somewhat quickly. Also DONOT make ANY boost with this vac/boost line disconnected, your car will lean out and you could damage the engine quickly.

thanks for reading,
Rob@modularturbo