Fiat Stilo JTD acceleration failure

Hello, I have a Fiat Stilo 1.9JTD that for a season at the time of accelerating, either in the first as in the other marches, it takes revolutions little by little until it reaches a point where the car is triggered. From 2000 or 2500 laps the car goes well but if you get out of here it is difficult for him to take speed until he reaches those laps more or less and then you notice like stretching suddenly.
Has anyone encountered with this or has any idea of ​​what it may be?

Check the caudalimetro sometimes it is in parameters and does not turn on the light but it is bad, check air filter and gasoil filter too.

I already changed all the filters and the flow put that of another styl that works well and gave me the same problem. I also checked the EGR and I also annul it but it remained the same

Caudalimetro

I have already changed the flow and the car is still the same