Engine idle speed too fast some times. idle speed 1200-1400 in drive at stop sign.
Wow a 2009 post.
2009 is long ago.,
You could override the idle controller and set the idle manually via this circuit
https://youtu.be/NrUIs_Jw3RQ
Three things to check for:
1) High idle switch is on..*(vehicle thinks AC is running but it isn't.
You can try turning on the AC and see if the engine slows down to confirm this one.
2) Sticking or worn out Idle Air Control or IAC, You might get a check engine light with this one.....you might not if it's a mechanical failure.
3) Simplest of all. A vacuum leak. You can get the engine vacuum read while running if you go to a mechanic with a vacuum guage or an OBD 2 ecu code reader. There should be specs on what vacuum levels are normal for you car at idle.
Good luck and be careful!
SOURCE: engine idle speed
Sounds like you idle air control valve is starting to mess up. You can actually take this off and clean it with throttle body cleaner and it should help get your idle back to normal. As is sounds the idle air control valve controls how fast/slow your car idles. It is located on the throttle body normally held on with a couple of screws. The throttle body is where the air duct hose coming from the air filter box ends at the engine block. Here is a picture of what you are looking for:
Make sure that you clean the valve portion and not the electrical plug with the throttle body cleaner. Let it air dry or blow lightly with compressed air before putting it back on. Let me know if you have any more questions. Thanks for using FixYa!
SOURCE: 1999 KIA Sportage idling too fast
You might want to go to your local AutoZ to have them hook it up to a code reader and give you any trouble codes that may exist, but chances are you problem is going to lie with one of three things. The first thing I would check is the Mass Airflow Sensor(MAS). The MAS sensor is usually connected to the plastic breather tube that runs to the air filter. The next thing I would check would be your Idle-Air Control Valve. Not too sure where Kia put their IACV's at, but AZ's website should have vehicle specific repair info through Alldata for your Kia. The last thing that I would check if you still haven't fixed the problem would be your EGR valve. Other than that, the only other thing that I can think of would be your throttle positioning sensor, but this possibility is least likely. Hope this helps guide you in the right direction. Have a great day!
SOURCE: low idle speed cause engine stop?
depending on what kind of car it is i would change the idle air control valve and clean throttle body if applicable
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