50
Check for proper installation of fuel pump and filter.
41 to47 psi
A bad fuel pressure regulator or a clog in the fuel return line that leads back to the tank will cause this.
Autozone.com
I'm Pretty sure the Z28 has to have 58lbs of pressure.That could be causing your problem.
No Z28 in 2010. Supposed to be released in 2012 model year.
MUST have 9 to 13 LBS. NO lower are higher are you will have problems.
On a 1992 Camaro Z28 with a 5.0-liter engine, the fuel pressure regulator is located on the fuel rail, which is mounted on the intake manifold. It usually has a vacuum line attached to it and is positioned towards the rear of the engine bay. To access it, you may need to remove some components for better visibility and access.
could be a faulty fuel pressure regulator
inside the fuel tank
the pump is located in the fuel tank