Fuel system pressure

[mzunino]

How long should the system stay pressurized after shut down? How long should
It take to drop say 10 psi?

I have rail gauge that has a small relief but seems to be leaking. What would you expect normally?

 

[Hotrodbuick]

Mine seems to hold pressure for a long time. Over night I know for sure. If the fuel pressure is leaking down might be leaking past the regulator. I'd check that first to make sure it's good. Stock regulator or aftermarket?

 

[mzunino]

I found it, leaking at the gauge.

 

[Hotrodbuick]

Good deal