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  1. 07-15-2010 10:16 PM #1
    el guapo2
    el guapo2 is offline Member
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    idle too high

    i recently did my ls swap n im havin trouble with it idling. it starts ok n then idles at a high speed. wat can be the problem i checked the vacums n seem ok can it be the idle sensor? or sumthing with the PCM? im using a 2003 5.3 intake n a cable throttle.
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  2. 07-15-2010 11:29 PM #2
    PitchBlackC3's Avatar
    PitchBlackC3
    PitchBlackC3 is offline Senior Member
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    Check the Idle Air Control solenoid. What year PCM are you using?
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  3. 07-16-2010 08:06 AM #3
    el guapo2
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    Its a 2002 pcm from a silverado 5.3
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  4. 07-19-2010 08:45 PM #4
    el guapo2
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    up top anyone
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  5. 07-21-2010 06:30 PM #5
    ThumpinZ
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    Have you tried the idle relearn procedure there is a post on here for it. I did it to my truck a few days after the swap because it just didn't want to idle sometimes. Cranks and runs everytime now. Different problem I know but maybe it will help.
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  6. 07-21-2010 07:08 PM #6
    el guapo2
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    im i wanna try the idle learn procedure but im afraid to put it in drive cuz its idling too high. on a cold start it ill idle alright but then the RPMs start to rise
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