Kia Optima intermittent engine stalling and chugging issue not duplicated by dealer on Kia Optima

Some Kia Optima owners report experiencing intermittent engine stalling and chugging issues that can be difficult to diagnose, especially when dealers cannot replicate the problem. These issues may stem from fuel system problems, where fuel delivery or quality affects engine performance. Additionally, ignition failures can lead to similar symptoms, as can air intake problems that disrupt the necessary balance of air, fuel, and spark for proper operation. Electrical system issues, including faulty wiring harnesses or sensors, have also been reported as contributing factors. Owners are advised to document specific driving conditions or patterns related to the stalling and chugging episodes to assist dealers in diagnosing the issue. Prompt attention to these potential problems is crucial to prevent further engine damage and ensure the vehicle's safety and reliability. If the issues persist, seeking a second opinion from another qualified mechanic or dealership may be beneficial.