92 deville shuts off while driving with ac on
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 92 deville shuts off while driving with ac on in Past Cadillac Vehicle Discussion; while driving coasting and turning my deville shuts off only when ac is on any suggestions would help. thanks...
  1. #1
    kzback is offline Cadillac Owners Member
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    92 deville shuts off while driving with ac on

    while driving coasting and turning my deville shuts off only when ac is on any suggestions would help.

    thanks

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on



    Failed or misadjusted ISC motor? What is your normal idle speed? Does the ISC motor plunger extend and engage the throttle linkage when you turn the ignition on?

  4. #3
    basscatt's Avatar
    basscatt is online now Cadillac Owners 10000+ Posts
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    Re: 92 deville shuts off while driving with ac on

    Quote Originally Posted by Ranger View Post


    Failed or misadjusted ISC motor? What is your normal idle speed? Does the ISC motor plunger extend and engage the throttle linkage when you turn the ignition on?
    ----------------------------------------

  5. #4
    kzback is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on

    im not sure what that is but i do notice the gas pedal sort of moves a little by itself while driving

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on

    The ISC motor (#80) is the small motor next to the TB with the plunger that extends to push on the throttle linkage (at idle only). It would not affect the throttle while driving unless you are off the throttle and decelerating.


  7. #6
    kzback is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on

    Ok, will it make the car seem like its on cruise cont, cause thats when i feel the pedal moving while letting up on pedal or coasting

  8. #7
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Yes, it's called "sail on" when that happens.

  9. #8
    onecool is offline Cadillac Owners Fanatic
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    Any codes? Could be a bad P/S.
    You did mention it happens while turing not sure how often the power steering switches go out.
    Try to recreate the problem with A/C and without A/C.

  10. #9
    kzback is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on

    only happens with ac on, while coasting or if im doing any type of accelerating it keeps running

  11. #10
    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 92 deville shuts off while driving with ac on

    Post #2 has the solution. It should be easy to find a thread with the adjustment procedure because there is over 1000 threads on that very subject.

  12. #11
    kzback is offline Cadillac Owners Member
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    Re: 92 deville shuts off while driving with ac on

    thanks

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