Hey guys. I got a 2008 Toyota Corolla LE with an automatic transmission with 187k miles. Car idles a little bit roughly. Checked for a vacuum leak and that was not it. Spark plugs are new iridium ones and oil and tranny fluids were just changed. My mechanic does not know and says only thing I can do is get new coils and tune up
No codes on the car
Change filters. Any OBDII trouble codes?
Get a better mechanic, they should be have proper equipment to detect bad coils