2000 Sierra 1500 P0200 Fuel Issue

[desertjeeper22]

Hi --

I have this 2000 5.3 with 250k miles and it started throwing a 300 code. I have replaced the obvious stuff -- plugs, wires, coil packs and injectors. I have checked the fuel pressure (52psi) and replaced the pressure regulator. I got the 300 code to reset for a while but now have a p0200 and it still doesn't idle quite right. On my code reader most of the monitor lights c, ev, 2a, oh, and e are flashing and don't go steady even when driving for a while. There is also fuel system 1 OL fault & fuel system 2 OL fault in the freeze frame (and I can't figure what those are) What else is left???. I don't have noid lights -- do I need to get some?

 

I'm pretty much frustrated

 

Thanks for any help

[txab]

Hi --

I have this 2000 5.3 with 250k miles and it started throwing a 300 code. I have replaced the obvious stuff -- plugs, wires, coil packs and injectors. I have checked the fuel pressure (52psi) and replaced the pressure regulator. I got the 300 code to reset for a while but now have a p0200 and it still doesn't idle quite right. On my code reader most of the monitor lights c, ev, 2a, oh, and e are flashing and don't go steady even when driving for a while. There is also fuel system 1 OL fault & fuel system 2 OL fault in the freeze frame (and I can't figure what those are) What else is left???. I don't have noid lights -- do I need to get some?

 

I'm pretty much frustrated

 

Thanks for any help

If your fuel pressure reading is 52 psi with key on engine off, then it's too low. Low pressure will cause misfire