Even without a check engine light have you done an OBD2 scan to see if there any codes? This could be lots of things, without knowing what the ECU is thinking it's hard to guess.
2018 gt sport concern
I started to recently have problems on my 2018 gt sport. Sporadic rough idle, fluctuating rpm while idle mostly when on the colder side. Jerking while accelerating especially uphill. Rough 1st to 2nd gear. Loss of power when I gun it from 0. No check light, 34k miles. I’m thinking it’s some sort of sensor? I should be covered under warranty if I’m having engine probs. Any help is appreciated!
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