no boost

HELLO NEW TO THE BMW WORLD SO PLEASE BARE WITH ME ON WHAT IM GOING THRU.. SO IVE ONLY HAD THIS CAR FOR ABOUT A YEAR NOW AND THERE WAS UPGRADES DONE ON IT BEFORE HAND AND RECENTLY I HAVE WENT THRU IT AND NOTICED FEW THINGS NEEDED TO BE ADDRESSED RADIATOR HOSE,OIL FILTER HOUSING GASKET, MAIN BELT...

I have a problem with my car, recently just had a load of maintenance and some upgraded turbos installed. Anyway, the car will not build boost at all, the logs show Ecu psi is 0, boost is 0, target is 0 regardless of revs, checked everything so far, Boost solenoids, vacuum lines, charge pipe...