Question about 2004 Hyundai XG350

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How can I adjust the rpm's on a 2004 Hyundai XG350L

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You can not adjust rpm's, it is controlled by the engine computer. if you idle is not right, either your throttle position sensor is not right, or your idle air control is malfunctioning, although there can be numerous other causes for erratic idle (vacuum leaks, throttle body or air filter needs servicing, etc.).

Posted on May 23, 2011

  • John Jenkins
    John Jenkins Apr 26, 2014

    That is not true, the

  • John Jenkins
    John Jenkins Apr 26, 2014

    the mounting holes on the throttle position sensor are oblong to allow for adjustment. you can loosen the mounting screws and turn the sensor to make adjustments to the rpms. you will see a white mark on top of the sensor, this is the factory preset, do not vary to far from this mark as the adjustments are very sensitive. a suggest you make the adjustments while the car is running so you can hear how it effects the rmps. It is very easy to get to, it is at the top of the firewall on the passengers side of the car.


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