Hello fellow Diesel fans,

I recently purchased a 1992 300SD which I absolutely adore. I immediately sent my new baby to my mechanics for some basic maintenance(fluids,filters, etc.). On his test drive, he noticed that the car wasn't making the power that it should. A week to ten days prior, he had a similar diesel which was producing much more power. He checked the turbo and says that it spins freely. He believes that a sensor might be bleeding off the boost prematurely. Unfortunately, he is not a MB mechanic and can't locate what is wrong. Anyone with a similar problem. Any help would be greatly appreciated.