Nissan Repair: no power, fuel pressure regulator, mass airflow sensor

Question
hi i have a nissan maxima2.o v6 [vq20 engine] it starts well but suffers occasional power loss on acceleration if you floor the x it crawls then it would give asudden burst of power it is very trying at stop lights i did a complete injector service and also cleaned the intake system it did not help it stand's up on incline's which is very fustrating please help

Answer
Jbarrie,

You are going to have to check for codes.  I would surmise that the mass airflow sensor is going out from the description you are providing.  Or, the fuel pump or fuel pressure regulator are messed up.  Need to check the fuel pressure and codes and email me back to be sure.