2024 Buick Envision — costs that mattered more than fuel economy

Start with the test that can prove you wrong. Write temp, speed, and in-gear vs coast when the 2024 Buick Envision does it — then decide on parts. That's the branch I'd chase this week. No need to make it theatrical. I'll poke at it this weekend.

I'd want a measurement, not a hunch. Move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. This is from a 2024 Buick Envision in Seattle with 12,000 miles. Happy to compare notes if your setup is different. Only after sitting overnight so far.

This is usually cheaper to test than to guess. Move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. Happy to compare notes if your setup is different. Parking it somewhere I can hear it better next time.