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Thread: Carburetor on V8 4100 HT Eldorado 1985 ?

  1. #16
    83CADMAN's Avatar
    83CADMAN is offline Cadillac Owners Fanatic
    Automobile(s): 83 Eldorado, 90 Seville, 94 Concours
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    Re: Carburetor on V8 4100 HT Eldorado 1985 ?

    I think you have to remove the starter and the right drive axle in order to remove the oil pan.
    You say you have fuel and spark but no start?
    My 83 has steel timing gears, so it turned out to be a worn out cam shaft causing my issues.
    Pull the valve covers, turn over the engine and check the rocker arm motion.
    In hindsight I wish I had done that before I spent cash.


  2. #17
    carnut is offline Cadillac Owners Master
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    Re: Carburetor on V8 4100 HT Eldorado 1985 ?

    As I said before, verify the rotor is pointing at #1 cylinder in the dist. cap when the timing marks are aligned. Very simple basic diagnostic step. A flat cam will still allow the car to start.

  3. #18
    KINGUYOM is offline Cadillac Owners Member
    Automobile(s): CADILLAC ELDORADO CONVERTIBLE 1985
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    Re: Carburetor on V8 4100 HT Eldorado 1985 ?

    thank's for the advice carnut !

  4. #19
    KINGUYOM is offline Cadillac Owners Member
    Automobile(s): CADILLAC ELDORADO CONVERTIBLE 1985
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    Re: Carburetor on V8 4100 HT Eldorado 1985 ?

    Some fresh news :

    we change the oil pump and the Eldorado start immediatly !
    but after 2-3 miles my Eldo stop again
    and don't want to restrart

    I don't understand, 60% of my car is new parts !!!!

    some ideas ?

    may be it's the computer who stop my cadillac ?

    thank's again
    friendly
    William

  5. #20
    83CADMAN's Avatar
    83CADMAN is offline Cadillac Owners Fanatic
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    Re: Carburetor on V8 4100 HT Eldorado 1985 ?

    You say with a new oil pump it started and ran then stopped.
    If you havent already, eliminate the relay with new one. You’ve replaced everything else but the ECM.
    Asuming you’ve checked and cleaned the ground connections at the engine.

    Quote Originally Posted by Bob Tarpenning View Post
    Go to a salvage yard and get a computer and the module that displays the codes from a wrecked car. I got a computer for my '84 Eldorado convertible from a wrecked '84 Brougham. It had the same computer. Cost $35.00. Works great.
    Bob T
    While cranking the engine, the ECM requires a minimum oil pressure reading, (about 5psi), from the oil pressure switch before completing the circuit by ground. If the ECM sees no oil pressure it wont complete the ground.

    The majority of electrical problims are due to poor ground connections.

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