Common Causes for Power Loss in 300D Turbo?

[arew264]

I was driving my 300D today after it has idled in the driveway while I fixed the vacuum system, and I decided I need to fix the lack of power. I'm having to floor it to get onto a 45 MPH main road in any sort of timely manner.
Some of this is probably because it's been idling in the driveway (carbon buildup?) and later I'll see if a diesel purge helps (don't think I've ever done one before).
However, it has always been pretty weak or weaker than I think it should be. What are some common methods for the loss of power? This is how it's been for quite some time, this is nothing sudden.


Also, on a side note, how do I adjust the throttle linkage? I think that part of my problem is that the first inches I push the gas pedal just get me an ever so slightly faster idle.