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Old 03-22-2018, 10:38 PM   #1
Medic701
 
Drives: 2017 ZL1
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black smoke

2017 ZL1 with NPP fuse pull I noticed that all the time when running hard ( I dont baby this car) I get black smoke on full acceleration. I also notice black dot deposits on back of car.
What could this be and how is the best way to fix? the car only has 3K miles.
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Old 03-23-2018, 05:21 AM   #2
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Sounds like a rich condition to me.
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Old 03-23-2018, 07:35 AM   #3
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Sounds like you are getting on it...
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Old 03-23-2018, 09:56 AM   #4
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That does sound rich. Unmodded I assume? You shouldn't see black smoke under any circumstances unless you've just babied it a long time (but you said you dont baby it) and jam down on it, but even then it wouldn't last long. May be time for a dealer trip or at least for someone to ride behind you and maybe film so you can see exactly what's going on.
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Old 03-23-2018, 12:12 PM   #5
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The one and only time mine has blew out a bunch of black smoke, was when it wasnt fully warmed up. I throttled it pretty hard to get out of the way of some heavy traffic coming at me. I looked like I was driving a pre DEF equipped diesel. Hasnt happened since, but I dont goose it when its cold. And my exhaust tips are always dirty with black soot. My car is all stock.

Same black dots stuck on my cars rear as well.
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Old 03-23-2018, 12:21 PM   #6
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that sounds pretty serious. ive never seen black smoke like in a cloud but my 2ss does produce black smoke on cold starts. also after driving around ive noticed the inside of the exhaust is coated in black soot. that also used to happen to my Silverado and regal GS. but ive also only WOT my Camaros less than 10 times combined.
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Old 03-23-2018, 01:02 PM   #7
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Product of direct injection
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Old 03-23-2018, 01:18 PM   #8
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Quote:
Originally Posted by swizlstik View Post
Product of direct injection
Mine does the same exact thing and I figured it was just running pig rich with factory tune. I don't know enough about direct injection to comment on this quote but that very well could be it.
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Old 03-23-2018, 01:39 PM   #9
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Quote:
Originally Posted by Aliveguy5 View Post
Mine does the same exact thing and I figured it was just running pig rich with factory tune. I don't know enough about direct injection to comment on this quote but that very well could be it.


http://youtu.be/xrLNDgrIw3U
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Old 03-23-2018, 01:53 PM   #10
ReefBlueCoupe
 
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Quote:
Originally Posted by swizlstik View Post
Product of direct injection
Quote:
Originally Posted by swizlstik View Post
Can you be more specific, or at least point to a section in that video that covers black smoke?
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Old 03-23-2018, 01:55 PM   #11
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Quote:
Originally Posted by ReefBlueCoupe View Post
Can you be more specific, or at least point to a section in that video that covers black smoke?


It’s the build up that’s blowing out.
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Old 03-23-2018, 01:59 PM   #12
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Right, but I've seen guys go down the interstate in non-DI Camrys from 10 years ago that blow black smoke when getting on it - assuming they hadn't gotten on it in a while and it's blowing out carbon buildup. I'm just trying to understand the correlation between DI and smoke, and if the OP says he doesn't baby the car, when is there time for any build-up?
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Old 03-23-2018, 02:13 PM   #13
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I don’t baby mine either. This is a clip of me on Charlotte Motor Speedway. I had been driving aggressively to there from Columbia, SC. As you’ll see, once I lay into it on the track it cleans itself out again.

http://youtu.be/ukaMvBewplE
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Old 03-23-2018, 02:22 PM   #14
ReefBlueCoupe
 
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Well, how does this guy explain his black smoke?

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