Kia Troubleshooting Questions? Ask a Mechanic
Hello, my name is***** am sorry to hear about your Kia. Most of the time this is caused by a failing throttle body, a vacuum leak, or a bad air flow sensor. I have found all of these wrong with this vehicle to cause it to not idle right. Can you tell me if the check engine light is on?
Thank you. You either have a bad crank sensor or the timing chain may be worn and loose enough to cause the correlation to be off. If the crank sensor does not solve it then the cam timing actuator needs to be checked to see if it is out of time. If it is not then the timing chain assembly needs to be replaced.
It should be located at the rear of the engine in the transmission bell housing.