What else to do for lean codes?
2000 Expedition 5.4 Eddie Bauer 234000 miles.
New coils, injectors, plugs, air filter, fuel filter. Pcv is
working properly, MAF is working properly, no
vacuum leaks at the intake or anywhere else. Egr is
working properly. I’m still getting lean codes p0171
and p0174. O2 sensors are good. Ruff idle
sometimes and hard start sometimes. Don’t know
what else to do.