P CODES (POWERTRAIN) P1100 - P1199 P1160 Questions

Hi Guys, I Used To Have: P0171/p0174 Which Are Lean Condition, But Right After I Changed My (fuel Filter To A Brand New One, I Cleared The...

While The Engine Is Running Smoothly, I Pulled Out The Plug From The Air Mass Sensor And The Car Stalled On Me Like It Was About To Die. But...