Hi,
I have a 2004 Z71 Flex that has low fuel pressure, I am having 44 psi.
I have already changed the fuel filter, fuel pump, and fuel pressure regulator. Before doing these changes I was having 42psi on fuel line, and when stepping on the accelerator it was dropping to 35psi and coming back to 42psi. After changing the pump I obtained 44psi and when accelerating the motor the pressure went to 55 psi and then returned to 44psi.
I have already looked for leaks, but I was unable to find any.
Another point is that after turning off the machine the fuel pressure drops 10psi in 5 minutes.
Does anyone has any suggestions for me to look for?
I have already done a search here, but I couldn't find anything different than I have done.
Thank you