I own a 2016 Ford Mustang Ecoboost.
About a month ago, I had a misfire in cylinder 3. I Decided to just swap out all spark plugs, and only plug that gave me a problem to get out was of course #3. Also replaced coil pack on #3. When I finally got the plug to come loose and pulled it out, a chunk of porcelain was missing. I've read about that happening before and solutions for it, but I'm afraid I may be past that point.
When I knew what happened, I had it towed to a shop to see if I could have them remove the pieces. What I should not have done before that was start the engine for just a second to see if I could blow the pieces out of the exhaust. I have heard from different people that this shouldn't be too big of an issue, the shop that removed the pieces said they got most but not all of them but should be enough for car to be okay.
Since then, the engine just is not running the same. Not always an engine light, but will misfire and run like crap on and off. Some days I have 0 problems, others it likes to sputter and misfire bad. Talked with another mechanic I know who said my engine may just be screwed and I should sell the car. I have only had it since October and absolutely love the car, so I absolutely do not want to sell but am tired of it running like crap and am not sure what to do.
I have replaced the ignition coil again since it was under warranty, and my next step was putting another new plug in. Not sure what I should do at this point, hopefully someone here may have an idea.