Just changed my EGR valve, kept getting P400 fault code, cleaned it loads but had to buy a new one. Problem is now, im sure my turbo is playing up. Used to love getting the surge of power around 1700, but now it seems like a smooth excelleration and im sure the turbo kicks in at 2000. Is this normal?

Checked the Vacuum pipes and they are ok, do i just need some redex or something to give it a good clean?

Should it always have been at 2000?...im getting withdrawals!!!