P0171 code help

[Viperi]

hey guys im geting a p0171 code. ive changed the maf sensor, o2 sensors upstream. the intake manifolds looks ok dont see any rips. any other idea? the rpm goes from 750 to 640 during idle

 

[IlovemyFX]

Check for an intake air leak. Have a look at the code info here:

P0171 INFINITI Fuel Injection System Too Lean Bank 1