WHAT IS CAUSING MY CAR TO HAVE BLACK SMOG COME OUT THE EXHUAST AFTER SHE WARMS UP?

  • Tiny
  • Mercedesmama
  • 1989 MERCEDES BENZ 300E
  • 132 MILES

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.

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Friday, April 20th, 2012 AT 5:11 PM

3 Replies

  • Tiny
  • Fixitmr
  • MEMBER

Is it gas or diesel engine?

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Friday, April 20th, 2012 AT 5:17 PM
  • Tiny
  • Mercedesmama
  • MEMBER

Sorry Gas

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Friday, April 20th, 2012 AT 5:22 PM
  • Tiny
  • Fixitmr
  • MEMBER

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.

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Friday, April 20th, 2012 AT 9:57 PM

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