p0302

I am looking for some advice on dealing with a misfire issue. Sorry it's a long post... but I think the details matter. A little history... the car is a 2019 Mustang Roush RS3 with an A10. It is a late build so it had the 2020+ phase 2 heat exchanger installed at Roush. The car is completely...

Hi Everyone, So I'm just beyond frustrated at this point. My 2016 Ecoboost Mustang has what seems to be an oil leak into plug well #2, causing oil fouling and rough idling on cold starts after the car's been run until good and warm and then let sit for a day or so. The roughness sounds like a...