Ford Mondeo Mk4 1.8 Tdci 2008 - The rotation is undulating error P0088 P0087

Hello, I have a problem with the Ford Mondeo mk4 1.8tdci 2008, the car goes out and the speed is waving, the problem is evidently with the fuel pressure on the Cr rail, the errors that are thrown out are P0088 and P0087 first comes back P0088 looking at the parameters, the fuel pressure jumps in a large range from 150 bar to 800bar after disconnecting the pressure sensor, the car works but has a very hard work. Now what has been done
-Replaced fuel filter
-car released from the side tank directly connected to the pump to exclude leakage
- revised injection pump with two fuel pressure regulators
-changed fuel pressure sensor
I have no ideas for any help, I will be very grateful.

siemens injections? look at transfers

Yes, the Siemens Piezoelectric fuel system has each button separately on the fuel rail and the effect is none, so that the injections are excluded.

Maybe someone has an idea or does not know whether you need to do some adaptation of the CR system in this car?

First of all, check if the fuel pressure is jumping.
And if the pressure sensor, and the rest have power, Adequate power.

Hi, did you manage to solve this problem because he has the same and I don't know what hurts him thanks for each hint