1993 Eldorado - 4.9 sensor ?
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 1993 Eldorado - 4.9 sensor ? in Past Cadillac Vehicle Discussion; Please, what is this sensor? He's back over the eighth cylinder spark plug. I can't find it anywhere. Thank you ...
  1. #1
    aspetras's Avatar
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    1993 Eldorado - 4.9 sensor ?

    Please, what is this sensor? He's back over the eighth cylinder spark plug. I can't find it anywhere. Thank you
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    Re: 1993 Eldorado - Dory

    Looks like a knock sensor. Controls ignition timing to compensate for different octane fuels and thus prevent ping or knock.

    https://www.rockauto.com/en/catalog/...on+sensor,5108

    Welcome to CF !!!

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    Re: 1993 Eldorado - Dory

    Thanks. That's what I thought, but when I'm looking for a new one, no one has such a connector

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    Re: 1993 Eldorado - 4.9 sensor ?

    The 4.9 did not have a knock sensor, thus the 92 octane requirement.
    Maybe the engine temperature sensor?

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    Re: 1993 Eldorado - 4.9 sensor ?


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    Re: 1993 Eldorado - 4.9 sensor ?

    The temperature sensor looks different from mine, but has the same connector.
    I searched the internet for a sketch of all the sensors of this engine, but I didn't find it. Is there such a thing?

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    Re: 1993 Eldorado - 4.9 sensor ?

    ................ perhaps in a subscription to www.alldatadiy.com - it's the online GM/Cadillac service manuals - for THAT car - with all sensor and wiring diagrams. So much info that it takes a while to get used to the vast amount of information in the site.

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    Re: 1993 Eldorado - 4.9 sensor ?

    Thanks for the link, but I'll still be looking. I don't want to give that much money. I'd rather buy the sensor for them after I find it :-D

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    Re: 1993 Eldorado - 4.9 sensor ?

    I am 99% sure that none of the 4.x's (4.1, 4.5, 4.9) ever had a knock sensor (I had a 4.9 AND a FSM). They DID have an "engine metal temperature" sensor (NOT coolant temperature sensor) that was mounted in the head. I really think that is what we are looking at here.

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    Re: 1993 Eldorado - 4.9 sensor ?

    Ranger is right. It's a temp sensor. They sometimes get broken while changing the # 8 plug.

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    Re: 1993 Eldorado - 4.9 sensor ?

    Heh, heh ....... RockAuto strikes again !

    Good to know about the type of sensor.

  13. #12
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    Re: 1993 Eldorado - 4.9 sensor ?

    So if it's a temperature sensor, where do you advise to find the same? Nowhere is the same ..

    EDIT:

    So I guess I found it. It should be this, but it probably doesn't sell anymore, or at least I didn't

    https://www.cadillacforums.com/forum...lant-temp.html

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