Intermittent Lurch—91 DeVille 4.9 - Page 2
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HT4100 4.1, 4.5, 4.9 Discussion, Intermittent Lurch—91 DeVille 4.9 in Cadillac Engine Technical Discussion; Originally Posted by HUF I do not think your ISC motor plunger is torx. Read up this thread, you'll find ...
  1. #16
    area310dude's Avatar
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    Re: Intermittent Lurch—91 DeVille 4.9

    Quote Originally Posted by HUF View Post
    I do not think your ISC motor plunger is torx. Read up this thread, you'll find the pictures of home-made ($0.01 plus tax) and commercially available inexpensive ($4.00 or so)tools you need for the job.
    http://www.cadillacforums.com/forums...tml#post940618
    Hi, I think the pitures have been deleted on this thread, would some folks be so kind as to put them back?

    This is a very important topic that always seems to come up.

  2. #17
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    Re: Intermittent Lurch—91 DeVille 4.9

    No one likes an intermittent Lurch.





    What pictures do you need?

  3. #18
    area310dude's Avatar
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    Re: Intermittent Lurch—91 DeVille 4.9

    Originally Posted by HUF
    I do not think your ISC motor plunger is torx. Read up this thread, you'll find the pictures of home-made ($0.01 plus tax) and commercially available inexpensive ($4.00 or so)tools you need for the job.
    http://www.cadillacforums.com/forums...tml#post940618
    ---------------------------------------------------------------------------------------------------------------------------------------


    Please read the post ABOVE. Not the "lurch" stuff (funny Adams family pic, btw).

    I think HUF had posted some pictures of tools he made for the ISC / Idle adjustment procedures. I would guess that topic has to be in the top 10 most requested questions around here. Just today somebody in the Seville/Eldorado forum was asking about removing the ISC motor, and couldn't figure out how to reach and remove the retaining nuts!

    I think HUF must have cheated Kent-Moore out of about $300 with the clever stuff he made himself. See just one example:

    http://www.handsontools.com/Kent-Moo...ch_p_6884.html

    Do you understand me now 'Sevillian?' Thanks for the past advice, btw.

  4. #19
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    Re: Intermittent Lurch—91 DeVille 4.9

    Didnt know if you wanted pics of the idle screw or of the tools.

    Fwiw, I made a tool for both the min air screw and the TPS bolts. It is a 1/4" with a torx bit inserted in the box end. Just an idea...



    I believe I used the same bit for the isc but I cant remember exactly...

    A regular pair of pliers worked fine for the ISC plunger.

  5. #20
    area310dude's Avatar
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    Re: Intermittent Lurch—91 DeVille 4.9

    That's so cool! I had a similar idea, believe it or not, but not as good as yours . . . .

    The ISC bracket screws need a #15 Torx in order to remove the motor completely, I am guessing . . . .

    I can't budge the ISC plunger at all with just pliers. That's why I will try removing the ISC motor from the throttle body entirely, first.

  6. #21
    drewsdeville is offline Cadillac Owners Master
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    Re: Intermittent Lurch—91 DeVille 4.9

    Quote Originally Posted by Sevillian273 View Post

    Fwiw, I made a tool for both the min air screw and the TPS bolts. It is a 1/4" with a torx bit inserted in the box end. Just an idea...

    This is what I do as well. It's the only way I know to get at those without loosening and maneuvering the whole TB.

    Also, I use channel locks for the ISC plunger.

  7. #22
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    HUF
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    Re: Intermittent Lurch—91 DeVille 4.9

    Quote Originally Posted by HUF View Post
    I do not think your ISC motor plunger is torx. Read up this thread, you'll find the pictures of home-made ($0.01 plus tax) and commercially available inexpensive ($4.00 or so)tools you need for the job.
    http://www.cadillacforums.com/forums...tml#post940618
    Here is the picture of home-made tool for ISC motor plunger adjustment and torx set for minimum air adjustment and ISC motor removal (as far as I remember the screws holding ISC motor were torx as well).
    Attached Images

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