Hello Community,
I'm new here and the owner of a 03 impreza with the Ej207 engine.
The car has a factory of Prodrive package with 305 hp.
I'm really happy with the car.
But, there is a problem which my German community cant help.
To describe the problem more precisely times I've made a video.
This spectacle happened in each gear.

The Boost goes up to 1,5 mpa and fall down to 1.2.


I check the pill its OK i clean the Solenoid but nothing help.
Maby you guys can help.

Sorry for the broken English.