Black smoke from the exhaust

GOKSY

MEMBER
1998 HONDA CIVIC
1.6L
4 CYL
2WD
MANUAL
200,000 MILES

I noticed the check engine light come on, the car began to use more gasoline than before, bringing out black smoke and I visited a mechanic. He said I should change the Electrical Control Unit, which I did, but the light was still on. I changed the injector fuel sprayers and the MAP sensor too, but the light is still on. I changed the ECU again, the light went off but black smoke is still coming out of the exhaust. I have tried to check if the car has any Oxygen Sensor, but could not find.
What can I do?

3 Replies

JIS001

MECHANIC
3,408 POSTS

Hi Goksy. Can you post the trouble codes you got from the check engine light? That should give us a clue to better guide you.

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Wednesday, June 17th, 2020 AT 10:14 PM

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Having the trouble codes would help more in diagnosing your black smoke issue.If you don't have access to a code reader or scanner most local auto parts stores have a tool loaner program and can rent you one.Here is a tutorial showing what is involved for reading codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, Some places like AutoZone auto parts will check codes for free.Hope this helps and thanks for using 2carPros.