Question about 1999 Saturn SL

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2002 Saturn SL idle too fast 2500

I have replaced the idle control valve and the throttle postition censor and it still idles at 2500, it's a 5 speed manual transmission. What else could it be?

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  • mamajj95 Feb 09, 2009

    Thank you so much. We will try that.

  • mapbrown1308 Mar 06, 2009

    high Idle at 2200 rmp. I have replace all the sensors, removered and cleaned the butterfly valve assy. cleaned O2 sensors fixed one vacum leak. rpm went up to 3500 rmp. talked the dealership they told me to check the the upper motor mount. After inspection found it was damaged replaced and the idle is now at 1800. So now what? Is fuel pressure? or injectors? I going to relpace the coil pack for 1 & 3 because 1 is firing. after this what eles can you check/

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More than likely its your Engine Coolant Tempature Sensor (ECTS) sound strange but its a common problem with saturns the part cost from 10-20 dollars and takes about 15 minutes to do

Posted on Mar 31, 2010

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Just sounds like the throttle body valve is not closing all the way, possibly stuck a bit from some type of build-up, it may need a clean

if this doesn't work you should be able to adjust the idle manually by taking a screwdriver and backing down the idler screw which is located on the throttle body that closes the butterfly valve inside

Posted on Feb 09, 2009

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Other things that normal cause high rpm at idle:
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Go here to find out how to get the fault codes:
http://www.extreme-check-engine-light-codes.com/GM%20OBD1%20Decoder.htm

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