shuttering at idle

@JeepCares I took this to the dealership they said it would take them 5-6 weeks minimum to look at it. I have this issue PLUS my brakes are hissing. The dealership is refusing to provide a loaner and said Jeep itself needs to provide that. I can’t go without a car for 6 weeks. video of engine...

Wanted to see if anyone else had this issue. 2021 Willys 3.6 with no engine mods. When I start it up cold and I sit at idle I get what I can best describe as a shuddering or surging sound and feel from the engine. It comes on and stops and repeats. I can feel it and hear it. And it's not very...