Loss of power and rough idle and jumping?

2017 KIA RIO
143,000 MILES • 4 CYL • 2WD • MANUAL
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MATTFOWLER1980
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Hello, I'm at my wits end and was hoping that someone with experience can shine a little lite.
My POS is a Kia Rio 2017. Since I've had the car I've had ignition issues and have changed the Plugs and Coils multiple times in the last 5 years. Last week I experienced the same issues. Loss of power and rough idle and jumping so I replaced both again. I did not however notice the oil on my 2nd cylinder plug until after installing and checking because nothing changed.
This weekend I installed a new valve cover/spark plug well gasket and again I installed new plugs. Should I have replaced the coils again as well.
Disclaimer: I've been driving it, as I have no other way back and forth to work. Can any one help?
Mar 9, 2026 at 11:28 AM
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STRAILER
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Yes, I would have replaced the ignition coils again as well, cheap coils go out often FYI. I would try finding Denso coils. Also, I would runt he codes to see which codes are stored which can help us fix the problem as well. This video can help

https://www.youtube.com/watch?v=LBCpCWEFnTg

Please go over this guide and get back to us. Ken
Mar 10, 2026 at 8:44 AM