What's your fuel pressure?
Still too low on the fuel pressure. Upper 50's (57+) at idle or it will not operate properly. These engines verge on prima donna status with fuel pressure, in my experience. I have a 2000 5.3L and a 2004 5.3L, both of which despise low fuel pressure.did fuel pump and fuel filter and fuel pressure regulator. have 50 psi at rail. it bleeds off to 0psi when motor is shut off. what else could be the reason for low fuel pressure. injectors leaking by?
Yes, it could very easily be leaky injectors causing all your problems. But before continuing the parts cannon w/ new injectors, I wanted to have you check all the free fix failure modes I could think of.someone mention it could be injectors leaking down after truck is shut off
ARES 71500 - Noid Light & IAC Test Kit - Easily Eliminate EFI and IAC Systems as Causes for Non-Starting Vehicles https://a.co/d/ipC6VvqDO NOT use a test light to check injectors. Use what is called Noid light . And will tell you if the is firing an injector .