92 deville sound at engine starts and stops
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HT4100 4.1, 4.5, 4.9 Discussion, 92 deville sound at engine starts and stops in Cadillac Engine Technical Discussion; Noticed on my 92 deville the last few days a sound, at startup., almost like a starter issue, but car ...
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    MARK2995 is offline Cadillac Owners Member
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    92 deville sound at engine starts and stops

    Noticed on my 92 deville the last few days a sound, at startup., almost like a starter issue, but car starts ok and runs fine, but now when the engine is turned off i hear the sound too, kind of a screetch like sound for a second. any ideas. thanks

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    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: 92 deville sound at engine starts and stops

    Quote Originally Posted by MARK2995 View Post
    Noticed on my 92 deville the last few days a sound, at startup., almost like a starter issue, but car starts ok and runs fine, but now when the engine is turned off i hear the sound too, kind of a screetch like sound for a second. any ideas. thanks
    Idle speed control motor (next to throttke body) makes noise when you turn the engine off. If the noie is louder than before it may be on its way to south...

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    92EldoTC's Avatar
    92EldoTC is offline Cadillac Owners Enthusiast
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    Re: 92 deville sound at engine starts and stops

    ^ i'll go with that answer too

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    carnut is offline Cadillac Owners Master
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    Re: 92 deville sound at engine starts and stops

    I'm thinking starter bendix not idle motor. Never heard an idle motor screech. Also could be the serpentine belt or tensioner bearing. Remove the belt and start the car, does it screech? if so, look for a pulley misalignment or a noisy bearing driven by the belt. Sometimes reversing the belt direction can help diagnose the nioise.

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