If that was the only graph I saw I'd say the MAF was slowly going bad. Looking at the other graphs it looks normal. How long ago did you change the MAF? Send them this log and tell them it's defective. It's possible the new MAF is going bad, this happened to me too.
thank for the response
1.5 years old ,it have 2 years warranty .
when i first time drive with this maf after install at there shop(1.5 years before ) ,the power was very good and the car feel lite and the engine go to 4000 rpm very easy with no load
2 weeks later back then stops act like this and the engine feel like he is on load
for now after engine head change ,with low km injectors the car act like a sport car jaw drops ,i was amazed .then after 3 weeks power drop ,the lose of torque was noticeable
how can maf do that !!!
thanks again