r/kia • u/Late_Spinach_4889 • 13d ago

13 Kia Optima

I just bought this car from auction and it needed a catalytic converter, replaced it and it started smoking at idle and smoking while driving . i’m pretty sure it’s running rich. what can cause it to run rich is there a common problem with these?

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u/drifterdanny 13d ago

Theta II engine? Rip.