thanks for the input. My car is horribly sluggish off the line but once the RPMS start to climb the turbo kicks in a bit. Also there is a lot of black smoke under heavy acceleration. at night time it is completely blinding to those driving behind me.

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W126 1983 300SD 286,000 miles and ticking
Baby blue exterior Grey MB tex
Recent work:
Replaced air cleaner mounting brackets and heat shields
Replaced alternator, fan and power steering belts
Replaced positive battery terminal
Replaced negative battery terminal and cord
New Duralast Battery

My car needs work.