I'm am having a hard time believing this is normal for these cars, but if I listen to my dealer he says it is! I bought this car from them only two weeks ago and ever since I have got the run around. Took the car to an independent Bosch dealer that the dealer recommended and they said it was probably a worn out I.P....at 100K?? That seemed odd, so I've been doing my research on this site and think I my be closing in on the problem. When I disconnect and block off the pressure line from the intake to the ALDA there is NO change in performance at all. I adjusted the ALDA CCW about 1 turn to check for any change and none again. No matter what I adjust or change on this device it makes no difference. Could it be stuck at one position and unaffected by presuure or adjustment? Can it be replaced and adjusted properly on the car?

The car runs good and starts well, but it also has a noticable roughness and puffs of bluish white smoke if I hold the RPM at 2300 and slightly "tip in" the throttle in neutral.

By the way the economy is quite good. About 29 city and 35 or so Hwy.
Thanks in advance for any help!