Fuel Pressure spec at idle for 5.3L

[alvocado]

I'm trouble shooting a low power issue and pulled some live data. My fuel pressure at idle and drive speed registers 44 psi on the scanner. I am unable to find a spec for idle fuel pressure, only pressure at the rail with the engine off (55-62 psi.) 

 

Does anyone have the factory spec for pressure at idle? 2011 GMC Yukon 5.3l

[CamGTP]

That is normal fuel pressure with a truck equipped with a fuel pump control module. At idle it will be roughly 3 bar pressure or 43.5 psi. Under load the pressure will vary based on engine demand, ranging from 43.5psi to around 60psi give or take.

[alvocado]

19 hours ago, CamGTP said:

That is normal fuel pressure with a truck equipped with a fuel pump control module. At idle it will be roughly 3 bar pressure or 43.5 psi. Under load the pressure will vary based on engine demand, ranging from 43.5psi to around 60psi give or take.

Thanks for the info.