How do I troubleshoot a rough idle in my Kia Rio?

Recently my Kia Rio has been running rough at idle and I'm not sure what the issue could be. It seems to be happening only when the engine is warm. Can anyone offer some advice on how to troubleshoot this problem?

Hi Tracy, a rough idle can be caused by a number of issues. It's best to start by checking the spark plugs and air filter. If those seem fine, then the problem could be with the fuel injection system or the ignition coils. It's also possible that there's an issue with the engine sensors. I recommend taking your Kia Rio to a certified mechanic for a diagnostic test.

Hey Tracy, I had a similar issue with my Kia Rio and it turned out to be a faulty EGR valve. This can cause rough idling and even stalling. It's definitely worth getting that checked out.

Hi there Tracy. My husband is a mechanic and he suggests checking the throttle body and idle air control valve. These can get clogged up and cause rough idling. Also, make sure to check for any vacuum leaks in the engine.