Backfire at cold start?

[Maverickxeo]

My 2023 Overland with 3.6L has had a rough cold start, twice over the last month or so, where it would start fine, but then idle drops, the vehicle shakes, it backfires once, and then is fine. This lasts about 5 seconds max. Both times, they were cold starts in the morning while parked in a garage (about 10C to 15C ambient).

There are no codes and no stored data... Any ideas what to check?

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[yoda13]

Mine has done something similar a few times, but without the backfire. It’s also cold mornings when it does it. I know that doesn’t help, but you aren’t the only one whose jeep does weird things. My first gladiator didn’t do any of the weird stuff, but this one sometimes does. I hope someone has some ideas…