Various smoke on startup
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Joined: Feb 2024
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Various smoke on startup
I've had the car for a couple hundred miles. It's a 2021 with 23k miles. I've read several of the threads on smoke but don't think i saw one like this.
https://photos.app.goo.gl/n1Zw7V4mvUJC2f3Y6
So it looks like a darker colored smoke puff out of one exhaust outlet right in startup and then some white out of the outside 2 tips. It went away pretty quickly so i figured it was condensation since it was cool last night.
Opinions?
https://photos.app.goo.gl/n1Zw7V4mvUJC2f3Y6
So it looks like a darker colored smoke puff out of one exhaust outlet right in startup and then some white out of the outside 2 tips. It went away pretty quickly so i figured it was condensation since it was cool last night.
Opinions?
Race Director
Joined: Jan 2014
Posts: 10,709
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From: Fulshear, TX
DI engines run incredibly rich at start-up to quickly warm the cats; that is the black puff you initially see. The white is just condensation while the engine/exhaust system is cold. Nothing here appears out of the ordinary. You should see my car with full headers + cats + Borla at initial start-up in cooler temps 
Thread Starter
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Joined: Feb 2024
Posts: 50
Likes: 16
DI engines run incredibly rich at start-up to quickly warm the cats; that is the black puff you initially see. The white is just condensation while the engine/exhaust system is cold. Nothing here appears out of the ordinary. You should see my car with full headers + cats + Borla at initial start-up in cooler temps
Thanks that eases my mind
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
Thread Starter
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Joined: Feb 2024
Posts: 50
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This is my first Corvette. My last car was a Chevy SS that i had headers and threw an LSA on. I did the headers myself.... Wasn't too terrible other than getting to the O2 sensors... Which was quite terrible
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Joined: Dec 2020
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From: Reality
DI engines run incredibly rich at start-up to quickly warm the cats; that is the black puff you initially see. The white is just condensation while the engine/exhaust system is cold. Nothing here appears out of the ordinary. You should see my car with full headers + cats + Borla at initial start-up in cooler temps
Now that I'm E85 there's no smoke at all or fumes just about. Lot's of moisture though when cold.
