Having issues starting my truck every time. I installed a new fuel pump and filter thinking it was the issue. The gauge wasn’t working either but with the new pump it was fixed. But when it starts it runs fine. Check the psi and it’s at 62 when you turn the key and when it’s at idle it’s at 55. When I turn off the engine the pressure drops slowly. Can this be the fuel pressure regulator? I put in a fuel injector assembly years ago just trying to see if this is the issue before I go any further. Thanks