What is causing my car to have black smog come out the exhuast after she warms up?

1989 MERCEDES BENZ 300E
132 MILES
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MERCEDESMAMA
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When I start her, she will start no problem, then she starts shaking. I will drive it right away, but the minute that she gets up to operating temp, around 90 degrees, she will shift funny, spit out black soot, and I will have to push the gas pedal to the floor to get her to do freeway speeds.
So far we have done a tune up. We run like sea foam, or b12, She also smells rich, I put the highest level of gas in her.
Apr 20, 2012 at 5:11 PM
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FIXITMR
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is it gas or diesel engine?
Apr 20, 2012 at 5:17 PM
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MERCEDESMAMA
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Sorry Gas
Apr 20, 2012 at 5:22 PM
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FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
could be a temp sensor failing or MAP sensor. both can make it run too rich. take a plug out and see what color it is. should be tan color.
Apr 20, 2012 at 9:57 PM