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Alright so after the knock sensor recall was fixed on my optima, just the engine block and turbo were replaced (metal shaving were found on both the turbo and oil) I feel the car sluggyish. If I step on the car and hit anywhere from 30-100 mph my rpms will not go over 4K and as soon as I let off the gas rmps instantly drop to 1-2rpms. Is this normal with the optima? Or am I having some issues?
 

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2011 Kia Optima
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CEL on? First, need to check the boost pressure. Could be a leak in the intake system, waste-gate adjustment.
 
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