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Cadillac Seville / Cadillac Eldorado Forum Discussion, ISC Motor in Past Cadillac Vehicle Discussion; I have a 1993 eldorado 4.9 I just replaced the,(ISC) idle speed control and a new TPsensor. I think I ...
  1. #1
    nickbucciarelli is offline Cadillac Owners Member
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    ISC Motor

    I have a 1993 eldorado 4.9 I just replaced the,(ISC) idle speed control and a new TPsensor. I think I set ISC correct idle is 800rpms now I have a humming kinda like bad ground. Any ideals???


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  3. #2
    brougham is offline Cadillac Owners Master
    Automobile(s): 1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
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    Re: Am I On The Right Track For Timing Setting, 91 Deville --Pics

    Start a new post. This one is 3 years old with a completely different subject title.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: ISC Motor

    and

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  6. #4
    nickbucciarelli is offline Cadillac Owners Member
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    Thread Starter
    Quote Originally Posted by brougham
    Start a new post. This one is 3 years old with a completely different subject title.
    1993 eldorado 4.9

    ----------

    Quote Originally Posted by nickbucciarelli
    I have a 1993 eldorado 4.9 I just replaced the,(ISC) idle speed control and a new TPsensor. I think I set ISC correct idle is 800rpms now I have a humming kinda like bad ground. Any ideals???
    My ISC motor is working fine I learned the Throttler position sensor sends a reading to ISC. From what I been reading, with key on engine not running set TPS @0.45 to 0.55. That being said I can't get my meter to get that reading can't turn the TPS that low

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