Misfire cylinder 3
 

I have a 2015 Mini Cooper s manual and sometimes my check engine light will come on, always misfire cylinder 3. Sometimes it will go into reduced engine power. It doesn’t feel like it’s missing until it goes into reduced engine power when it turns the injectors off. I have switched coil and spark plugs with cylinder 1 and it keeps showing cylinder 3. I can clear the codes and it will not come back on anywhere between 3 days and 2 months. I am suspecting something with the injector but am unsure. Any help would be appreciated!