Ok guys, I have a 350sdl here and its driving me nuts! The car has 180k miles, with a new MB engine assy at 132k. The car always ran great, gave good fuel mileage, and was fun to drive. Now thw issue; in the last year or so, we have noticed that it seems to be losing power and wont pull above 3200rpm. I know about the older cars and the alda soot problem, but this car does not seem to have the alda, as it looks like it has a ecu control for the enrichment under boost. I assume there must be a sensor somewhere that sees this, but I am lost!

Any help would greatly appreciated!.........JM