nissan primera p12 dci no power

you should clean the egr hole with carburetor cleaner. There is a spring loaded valve in there. It should move freely. If it's not clean the valve doesn't close fully, which will cause loss of power. I use to spray carb.cleaner in there while moving the valve by hand until I feel it operates smoothly.
And you should drive with the egr cable disconnected while debugging this. The 1.9 dci does not go into limp mode when egr cable is disconnected. I assume that also goes for the 2.2.
EGR valve sticking will cause slow/late turbo pressure build up.

When nissan say they replaced the egr valve, I think they just replaced the solenoid, not the valve itself.

Your problem could be caused by boost sensor or maf read wrong values, which will cause the ecu to adjust fuel injection too rich (black smoke) or too lean (no smoke). Get a ECU readout of intake pressure and boost pressure while driving. That could give you a clue.

I dont know how it ran until the SCV was done and and the pump reset there is a fuel rail high pressure sensor on the top left of the engine, if its faulty could this be the problem ????

weechicken09 wrote: No the turbo kicks in ok, you can feel it, its as if something was hding me back like a big elastic band, and no calipers sticking its just not geting the power it should have ?????

Did Nissan check your fuel pressure, when was the last time the fuel filter was changed?

No the turbo kicks in ok, you can feel it, its as if something was hding me back like a big elastic band, and no calipers sticking its just not geting the power it should have ?????

Already did no splits or no leaks