Black tailpipe emission

ATI A

MEMBER
1997 OPEL CORSA
1.4L
4 CYL
2WD
AUTOMATIC
90 MILES

Black smoke tailpipe emission either during start or idling and continuous after driving. Stop sometimes during driving acceleration I feel like some relay in auto shifting and as the engine is under load until black smoke puff exits forcefully from tailpipe at that time. I feel the auto shifting change smoothly and the engine free from distress. What causes of this black smoke black smoke puffing from tail pipe? Why auto shifting delay happens?

Saturday, October 28th, 2017 AT 12:25 PM

2 Replies

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

Black smoke normally indicates a too rich fuel mixture. There could be a sensor sending the wrong info to the computer and thus the computer adjusting the fuel trim wrong for them conditions. So, with that in mind, I would suggest you start by having the engine trouble codes retrieved from the DIC and the engine control computer module.

Was this

answer

helpful?

Yes

No

Saturday, October 28th, 2017 AT 1:45 PM

MHPAUTOS

MECHANIC
31,937 POSTS

If there are no fault codes that reflect an over fueling problem, i would then get the injectors flow tested just to make sure you do not have a leaking injector. also, check that fuel pressure is correct.

This link can help as well

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

Cheers!

Was this

answer

helpful?

Yes

No

Sunday, October 29th, 2017 AT 4:51 AM