I have a 2009 sentra se-r spec v. I have no check engine light on or any pending codes. Doesn’t matter if it’s hot or cold when the power loss happens. Engine chatter gets on the loud site when it’s acting up also. But the weirdest thing is sometimes if I shut off the car and restart it it will go away and run strong again. I did a tune up replaced my pre cat replaced maf sensor. I just have no clue what the problem is and there is barely anything on the internet about this year and model. I’m just not getting any check engine lights so I’m not trying to throw money at it till it stops.