Hi I have a bmw e46 2001 330d she is the 184bhp model I have a slight boost issue when I floor the car in 3rd ,4th or 5th gear from low revs I get a slight pull back like as if it drops out of boost for a second this happens 2 or 3 times threw the gear you cant feel anything in 1st or 2nd gear

Any help would be great as it's recking my head at this point thanks