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Thread: 2002 deville rough idle HELP!

  1. #31
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    No, the IDs are not the codes, that's a separate function, I'm not fully sure what they refer to.


  2. #32
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
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    Re: 2002 deville rough idle HELP!

    Quote Originally Posted by 2002 DHS View Post
    Ok I'm confused. It asks it you want ALL CODES? I hit yes and then it starts listing them. Then it asks if you want to CLEAR ALL CODES? I hit yes. Then it asks ID? no takes you back to the start and yes takes you to more codes.
    If the IDs are the codes then what are the first set of numbers?
    --------------------------------------
    after CLEAR ALL CODES - you are finished -
    but you can't just get out of "DIAGNOSTIC MODE" -
    you must turn the ignition OFF -

    ID is another part of the diagnostics -
    you don't need to get into it -

  3. #33
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    You don't have to turn the ignition off to exit the diagnostics. I just hit the English/Metric button to go Metric and then back to English and I am out of diagnostics. Any other function will get you out of diagnostics.

  4. #34
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    I got the new IAC and installed and no improvement. Still a rough idle. I saw to spray brake cleaner on components to find a vacuum leak. Tried it and no change in the rpms. Then told to use carb cleaner to detect the vacuum leak. Still no change in the rpms. I assume no vacuum leaks??? I don't know what else to do. no codes either.

  5. #35
    2002 DHS is offline Cadillac Owners Member
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    Re: 2002 deville rough idle HELP!

    Local "used to be a Chevy dealer" now does anything said it was a cyl 3 misfire and could be a bad coil pack. I pulled the rear coil pack from the local You Pull-it and with God by my side it is fixed. thanks

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