Exhaust “like” smell inside the car (after warmup) and only once a trip.

JoeBent

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Buick Ownership
2013 Encore / 2025 Encore GX
2013 Buick Encore 76K miles…

Been happening for a couple years now. Only seems to happen while stopped, after we’ve traveled just a few miles AND, does NOT reoccur after, regardless of how many miles we then travel. We just roll down the windows for a few seconds then close them.

At first I thought it was the car / truck in front of us.

Took a trip to Nashville (from Pittsburgh) two years ago, stayed there for a week, it never occurred.

NO codes being thrown, the car has passed (Dealer) safety and emissions testing the last 3 times. Interestingly enough, during the most recent testing, we were informed that the “Flex” pipe was bad….. I was excited to replace it (myself) thinking “Hey” that’s got to be it….. and surely it was physically bad / separated. Took it back to the dealership and they passed the car.
Day later, problem is still there.

No, I’ve NOT asked the Dealer to locate the issue.

Any ideas / thoughts 🤷🏻‍♂️
 
Im having the same issues and now its getting worse. Last thing i had done was the Flex Pipe a few months ago. Mine is a 2019 Buck Encore 110K miles on it.
 
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