hey, I managed finally to solve the issue - it was a dirty fuel injector on one of the cylinders. That's why when crusing and accellerating all was ok, but it struggled on idle (injector was providing uneven loads of fuel, and ecu was trying to countermeasure - thus causing the rpms to...
Hi all, I hope you can help troubleshoot this one. I have 2015 Ecoboost with automatic trans with a pretty low 54000 km on the odo, and 2 weeks ago it started behaving like on the video (I posted in on the Mustang reddit sub):
Basically, only on warm engine it doesn't keep stable RPMs on idle...