Idle issues
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Idle issues in Past Cadillac Vehicle Discussion; I have a 2004 SLS, I am having random high idol issues. Some times I can just shut the car ...
  1. #1
    Jonfish is offline Cadillac Owners Member
    Automobile(s): 2004 sevile
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    Idle issues

    I have a 2004 SLS, I am having random high idol issues. Some times I can just shut the car off and turn it back on and it idols fine. Could this be a bad IAC? Thanks for any advice.

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: Idol issues



    It's possible, but start with a good TB cleaning. A bad IAC valve would illuminated the MIL and set a DTC. See the Tech Tips section if you need more info on how to do it.

    P.S.
    I edited your title for you.

  4. #3
    cgar44 is offline Cadillac Owners Member
    Automobile(s): 2002 STS
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    I'm by no means an expert and I don't know all the details of your problem but I do know the car has the ability to high idle when certain conditions are met. for example the car will increase rpm when the computer senses a high electrical discharge rate such as when too many electrical features are engaged. I believe temp can also cause the car to high idle if it is cold started on a cool day. This is just speculation however. The electrical discharge bit is in the manual and the cool day bit is from my observations as every time I cold start the car it idles at a set high rpm for a bit before returning to regular idle

  5. #4
    Jonfish is offline Cadillac Owners Member
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    Re: Idol issues

    Thank you Ranger, I will take a look.

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    CGAR44 thanks I was not aware that the electrical discharge could effect idol.

    ----------

    Ranger,

    New to site here and can not locate the tech tips section. Can you Guide me? Also the MIL is illuminated and I do have a DTC code. What is TB short for?

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Woodstock Ill.
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    Re: Idle issues

    TB = Throttle Body.

    Go back to the home page. Scroll down to General Discussions. Under general discussions you'll find Item Specific Cadillac Discussion. Withing Item Specific you'll see the Cadillac Tech Tips forum.

  7. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Idle issues

    ........... and read the Acronyms sticky post just above this one - matter of fact, read every sticky in every forum you visit. Amazing how much info is posted in stickys - so you (theoretically) see that info first.

    Have you studied the Cadillac Technical Archive up in the top black bar ?? Basic info for every Northstar owner.

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