Possible misfire on cold start?

[Rebel_Tom_2025]

My 2025 Rebel has a very ruff idle on cold start for about 20 seconds, the rpm’s go up and down. Truck only has 600 miles on it . Sounds like a misfire to me. Is anyone else experiencing this?

 

[crazyru2]

Yes, my 2025 limited with 20,000 miles started the same. Been in shop 10 days. Dealer trying g to figure it out.

 

[Brahmajoe]

There’s PCM flash updates for that issue

 

[Rebel_Tom_2025]

There’s PCM flash updates for that issue

So if I bring it in to dealer, it’s a quick update?

 

[Rebel_Tom_2025]

Yes, my 2025 limited with 20,000 miles started the same. Been in shop 10 days. Dealer trying g to figure it out.

Are they not able to replicate the issue?

 

[Brahmajoe]

So if I bring it in to dealer, it’s a quick update?

Go to NHTSA.com and lookup up your truck. It will show all the technical service bulletins. There are flash updates for the cold start misfire.