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Thread: surging idle at stop. thoughts?

  1. #1
    Join Date
    Aug 2005
    Posts
    68

    Default surging idle at stop. thoughts?

    Hey all. 92 525i A.

    I did a search and couldn't come up with anything on the following...

    Car starts fine and when it gets warmed up, occasionally at stops, the car will start to idle down like it's going to die, then go back, then idle down again... then go back up...

    once I press the accelerator to get moving, it's fine.

    It doesn't do it all the time.

    Any thoughts are appreciated. Thanks!

  2. #2
    Join Date
    Mar 2005
    Location
    Bethlehem, PA
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    661

    Default

    Have you ever cleaned your idle control valve?

  3. #3
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,839

    Default

    or looked for intake leaks?
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  4. #4
    Join Date
    Aug 2005
    Posts
    68

    Default

    Quote Originally Posted by SRR2
    Have you ever cleaned your idle control valve?
    No I haven't. Is it a fairly easy process?

    I'll do a search on it.

    Thank you.

  5. #5
    Join Date
    Aug 2005
    Posts
    68

    Default

    Quote Originally Posted by 632 Regal
    or looked for intake leaks?
    No, I haven't done that either.. sounds like a couple things I need to try though.

    Thanks guys.

  6. #6
    Join Date
    Mar 2005
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    Bethlehem, PA
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    Default

    Yeah. You take it off, seal off one of the two openings and pour carb cleaner or Goof Off into the other. Then seal that one off (I use Saran Wrap and rubber bands for that, you can use anything that can stand up to the solvents) and shake it around. The valve operates by vibrating axially, so the best way to slosh the solvent around is to twist it rapidly back and forth on its axis. You will look stupid as hell while you're doing this unless you have some Jamaican folk music playing in the background. Otherwise, perform the cleaning activity while no one else is around to make fun of you. When it's clean, you should be able to hear the armature clicking as you twist the valve back and forth.

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