Gets black from the exhaust when on open road?

Tiny
PANTHERA_MAN
  • MEMBER
  • 1999 DAIHATSU MIRA
  • 72,849 MILES
Could you please tell me why the back of the car gets black from the exhaust when on open road, And is there some way to fix it thanks
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Thursday, January 12th, 2012 AT 9:02 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

If I understand you correctly, you are getting black smoke out of the tailpipe and the smoke making the back of the vehicle black?

There are a number of reasons why you will get black smoke out of the tailpipe.
It could be due to shorter fuel injector, faulty oxygen sensor, failed fuel pressure regulator, bad mass air flow or manifold pressure sensor, vacuum leak, stuck open EGR valve etc.

Take a look at this helpful guide, it covers the typical reasons for black smoke.

https://www.2carpros.com/articles/engine-black-smoke

Go through this and report back to what you find.

If you have any questions, feel free to let me know.
Thank you.
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Monday, January 24th, 2022 AT 3:16 PM

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