On the Ross Tech website there's a graph depicting the actual and requested boost v. rpm for a 1.9 TDI engine. I recently did the same test for my A3 2.0 TDI PD engine. The graph is slightly different. There is more jitter with the actual boost around the 2100 rpm. Also the requested boost decreases towards 4000 rpm where as the 1.9 TDI boost chart shows that the boost is constant until that point. Are there any data log files of 2.0 TDI PD engines (on an BKD A3 preferably)? Here's my data log file... the values in question are between 300 and 316 seconds.