Random smoke while driving coming from under hood?

2007 CADILLAC CTS
250,000 MILES • 2.8L • V6 • 2WD • AUTOMATIC
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LEYNA07
  • MEMBER
  • 41 POSTS
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?
Jan 6, 2023 at 2:41 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 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.
Jan 7, 2023 at 10:48 AM
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