I drive an 03 Hyundai Sonata with a 4 cylinder engine. I was always told rough idling means it is time for new spark plugs. According to my maintenance schedule it is quite a while before I need to get new spark plugs (30,000 miles off)
What else could be the problem?
Thanks in advance
The AC does contribute to the rough idle, but I have driven with it off, and I still get the rough idle.