1989 caddy surging
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HT4100 4.1, 4.5, 4.9 Discussion, 1989 caddy surging in Cadillac Engine Technical Discussion; Hi everyone. Im new here, mainly to find out what is wrong with my father's caddy. At a stop light, ...
  1. #1
    DANS898MPCADDY is offline Cadillac Owners Member
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    1989 caddy surging

    Hi everyone. Im new here, mainly to find out what is wrong with my father's caddy. At a stop light, when you take your foot off the brake even the slightest bit, the engine starts "chug-chug-chug" and with each "chug" the car moves forward. The idle sounds like crap, but he did just have a tune up not too long ago. Any idea's as to what the chugging problem is? Thanks for any and all help.

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    JJhomer83's Avatar
    JJhomer83 is offline Cadillac Owners Connoisseur
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    Re: 1989 caddy surging

    Quote Originally Posted by DANS898MPCADDY
    Hi everyone. Im new here, mainly to find out what is wrong with my father's caddy. At a stop light, when you take your foot off the brake even the slightest bit, the engine starts "chug-chug-chug" and with each "chug" the car moves forward. The idle sounds like crap, but he did just have a tune up not too long ago. Any idea's as to what the chugging problem is? Thanks for any and all help.
    WELCOME to the forums.
    I personally can't give you any advice. Don't know enough but I can WELCOME you.


    can someone please give there 2 cents and be a good person

  4. #3
    DANS898MPCADDY is offline Cadillac Owners Member
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    Re: 1989 caddy surging

    oh yeah, its the 4.5L v-8. anyone??

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    JJhomer83's Avatar
    JJhomer83 is offline Cadillac Owners Connoisseur
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    Re: 1989 caddy surging

    Quote Originally Posted by DANS898MPCADDY
    oh yeah, its the 4.5L v-8. anyone??
    The 4.5L is a v-8

  6. #5
    carnut is offline Cadillac Owners Master
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    Re: 1989 caddy surging

    [QUOTE=JJhomer83]WELCOME to the forums.
    I personally can't give you any advice. Don't know enough but I can WELCOME you.


    verify the throttle cable is returning to curb idle. if it is binding, surging will occur. also make sure the cruise control cable is not binding as well. remove the cruise cable from the throttle lever and see if it now returns to curb idle. also in rare cases i have seen a weak throttle return spring cause this. reply on this thread with what you find. i'm available after 9 pm west coast time. hope this helps, Bill.

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