Good evening. I have a 2011 that has a misfire cylinder 3 even after the coil, spark wires and plugs and fuel injector have been changed. Service station thinks it is an issue with the cats, everything I have read does not indicate an issue of misfire with cats accept that a misfire will cause a cat problem and not the reverse. Any help is appreciated.
thanks

 

Do a compression check.

 

thank you for your response. A compression test was done in the beginning of the fun journey we are on. Shop said compression was great.

 

Can you feel the misfire with the motor running?

 

Yes. Some days it is more noticeable.
thank you for responding.