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Random smoke while driving coming from under hood?

Tiny
LEYNA07
  • MEMBER
  • 2007 CADILLAC CTS
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
Every now and then car will randomly start smoking with no sign of overheating temperature gauge stays normal but do also notice certain instances when in park will idle on its own and has shut off, but car automatically turns back on. Any suggestions on where to begin my search?
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Friday, January 6th, 2023 AT 2:41 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,279 POSTS
This sounds like you have a valve cover leak, or a coolant leak does the smoke smell like anything. I would lift the hood and check for leaks with a flashlight.

These guides can help as well:

https://www.2carpros.com/articles/engine-is-leaking-oil

and

https://www.2carpros.com/articles/car-is-leaking-coolant

Let us know what happens and please upload pictures or videos of the problem.
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Saturday, January 7th, 2023 AT 10:48 AM

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