Question about 1989 Oldsmobile Cutlass Ciera

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1999 KIA Sportage idling too fast

My 1999 KIA Sportage is idling way too fast. When in gear, it jerks when at a stop. When in neutral, it idles fast and if drifting, idling speeds up.

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  • cherina Nov 23, 2008

    My Toyota Echo 2000 had aircon evaporator replaced and cleaned by Denso.  But after the service, the engine malfunction was on.  Furthermore, it was idling too fast and it seemed to accelerate on its own at a fast speed.  Computer has been reset; negative terminal has been re-attached but after less than hour of driving, the light reappears.

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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!

Posted on Nov 23, 2008

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jerks when?

moving the shift lever. with hand?

moving car. in gear,name the gear, drive, L or reverse?

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y/s

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Some makers used Vacuum releases for their emergency brakes which had a Vacuum switch connected to the shift assembly. This would account for a stumble if Vacuum vented out through this switch.

More common for shifting stumble to occur from Park to Drive, engaging a load on the engine, not to stumble to a freewheeling Park position. Sounds like idle speed control is sluggish to stabilize the motor.

You also have idle speed control problem with A/C, kind of shows that A/C was what kept the engine running because when you turned the A/C off, the car died.

I am going to give you some Websites for wiring diagrams. Alldatadiy.com amd Autozone.com with free wiring info upon registering your vehicle.

It seems that the base Idle speed control is not working and the A/C idle speed control is.

Also check for Vacuum leaks on the intake manifold by spraying water from a pumpbottle on the seams of the gaskets.

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