I have a 2.3 2016 Mustang Ecoboost, the car has 71k miles but the engine has about 3k. I have replaced all 4 plugs. The engine will sometimes misfire when going about 80 mph, It will shake the entire car, I haven’t been watching rpms but if I use paddle shifters in sport mode it will be apparent the issue has to do with rpms as the car misfires horribly when using the paddle shifters. I’m not certain of what the issue is but if anybody has any other ideas I’m all ears.