Got an Alfa 159 about 4 months ago. Up until this point I've changed the following: rear springs, one front suspension arm, 2 bushings, a thermostat, a dpf, a temperature sensor on the dpf, hand brake cable. I currently have no error codes and the car runs fine. Cleaned MAP and MAF, known for a fact EGR is off, remapped and blanked, also swirl valves are blocked in the off position. I decided to map the car to the original software and have the EGR back on. I'm happy with the car for now, with the exception of one thing: I cannot believe it is so lazy with low down revs. It's been the same with the EGR off, before. If i exit a roundabout in second at 1100 rpm or so, i grow old until revs pick up until 1500-1600 and turbo kicks in. If I am slowed down by traffic in front of me to again, about 1 to 1.2k rpm in 2nd, it takes ages to regain speed until turbo kicks in at about 1500 rpm. Same with taking sharp corners in which you have to slow down. Is the problem the swirl flaps removal? I'm thinking of getting a new inlet manifold with fresh swirl valves next. Also, I seem to be getting close to a DPF regeneration, since it says it's about 90% clogged. Is it normal that the car at this stage doesnt boost fully? It boosts only to about .8 to 1 bar and is more sluggish recently. I know it's not a vacuum leak since: a) it's only been this way the past few days, it doesnt smoke nor whistle or make any strange noises and b) the boost works well for the first minute or so when starting the engine, be it cold or warm.