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If I aggressively drive my car it will smoke or shuts off and smokes

Tiny
ABREU ABREU
  • MEMBER
  • 2002 MERCEDES BENZ C240
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 86,000 MILES
My car drives okay. I am having an issue with it burning oil all the time. You can smell it. If I try to drive it aggressively it starts to smoke or shuts off and smokes. I got a diagnostic test it says two of my o2 sensors need to me replaced and cylinder one and four are mix firing. I have replaces all the spark plugs and wires. It drives better but still smokes and shuts off when taking off fast (not speed racer fast). I have to pick up speed slowly to use it on the high way. Please help
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Tuesday, October 11th, 2016 AT 10:12 AM

9 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I doubt you are burning oil. It is more likely that you are leaking oil and it is dripping onto the exhaust. Most likely from the valve covers.

The diagnostic test did not tell you that the two sensors are bad. The codes merely tell you what is being reported by the sensors and the technician has to determine the cause.
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Tuesday, October 11th, 2016 AT 12:31 PM
Tiny
ABREU ABREU
  • MEMBER
  • 5 POSTS
OK I'll get that checked. What about the smoke and shut off when I try to drive fast. I have to take off slow and pick up speed slowly for it nor to smoke. Or does that have something to do with he valve covers as well?
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Tuesday, October 11th, 2016 AT 8:34 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Just a quick question, is it smoking from the exhaust or under the car?
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Wednesday, October 12th, 2016 AT 1:50 AM
Tiny
ABREU ABREU
  • MEMBER
  • 5 POSTS
The exhaust, white smoke but it goes away. I checked the radiator for oil and vise versa and its all good. It doesn't even last long its only for a short time then its gone.
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+1
Wednesday, October 12th, 2016 AT 5:59 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Are you topping up the coolant at all, as often white smoke is coolant being burnt.
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Wednesday, October 12th, 2016 AT 1:41 PM
Tiny
ABREU ABREU
  • MEMBER
  • 5 POSTS
Coolant is topped off. I check it all the time just to see if the level decreases.
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Thursday, October 13th, 2016 AT 5:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
Please let us know what you find so it will help others.

Best, Ken
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Friday, October 14th, 2016 AT 11:51 PM
Tiny
ABREU ABREU
  • MEMBER
  • 5 POSTS
Ok
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Sunday, October 16th, 2016 AT 8:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
Those engine have a vacuum pump in the rear which leak oil also I thought I would throw that in there.
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Sunday, October 16th, 2016 AT 10:31 PM

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