Originally Posted by
Jim6869
I get the codes...P0171 and P0174 Pnd Mod10 System Too Lean.
I replaced the oxygen sensors (2 upstream 2 downstream) with Bosch parts and codes came back.
My next plan of attack will be
Mass Air Flow Sensor.
Am I on the track? PLEASE HELP
You had "too lean" showing up on both sides of the engine and you replaced the O2 sensors? Sounds to me like the O2 sensors were simply telling you the truth and that you really ARE running too lean.
As to where to go next, I'd try cleaning the MAF (that is, take it OFF the car and really clean it) and looking for vacuum leaks. I imagine a can of Seafoam would not be a bad idea, either.