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?

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.

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

MHPAUTOS

MECHANIC
31,938 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!

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