i have 1997 mustang GT 4.6 liter 5 speed tring to get it ..say's that #1 And #2 Banks Are Lean.changed O2 sensors #1 upstream #2 downstream both cats,fuel filter, fuel cap, egr sensor, evap,Pcv,change oil but still same codes. don't know what else i can do.

 

Check for vacuum leaks.