1.8L Dual carb question

Discussion in 'General Motoring' started by jasonp, Jan 7, 2005.

  1. jasonp

    jasonp Guest

    I just bought a 1985 lude, 1.8L dual carb..

    I dont have a manual for this car yet so I am hoping someone can yep me out.
    The cat-converter is fooked on this thing, it's completly plugged up. My
    question is: Is there an O2 sensor hooked up to the cat? I'm planning on
    just getting rid of it completly, any issues with this?
    jasonp, Jan 7, 2005
  2. jasonp

    Jafir Elkurd Guest

    You probably have an O2 sensor, but it would be before the cat, so you
    shouldn't have any "computer" problems.
    Jafir Elkurd, Jan 7, 2005
  3. With a carb, there are two possibilities. 1985 is in the heart of the
    notorious era of "feedback carburetors" - carburetors that were tweaked by
    solenoids to carefully adjust the mixture. Feedback carburetors use an O2
    sensor, and have a bundle of wires and a bewildering array of vacuum hoses
    in most cases. Or it may be an older "mix it and burn it" carburetor that is
    running too rich. The O2 sensor is undoubtedly long dead if you have one,
    and the cat was probably melted by an over-rich mixture. Removing the cat
    won't change much except for clearing the blockage, but is a violation of US
    clean air laws. (Assuming you are in the US...) if you are caught and
    prosecuted, the penalties are positively medieval - tens of thousands of
    dollars (no fooling!) and possible prison time. You should be able to get a
    replacement cat for about $100 installed.

    Michael Pardee, Jan 8, 2005
  4. jasonp

    jasonp Guest

    That sounds like a very similar setup to my 89 YJ, it has a brutal computer
    controlled carb that is a peice o shit... There are a whack of vaccum lines,
    so im assuming it is the "tweaked" version.

    Thanks for the input, looking forward to playing with this little "beater"

    I'm in Alberta we have no emmisions testing on any vehicle.
    jasonp, Jan 10, 2005
  5. The O2 sensor is mounted on the exhaust manifold. It looks like a spark
    plug with a wire on top running toward the radiator. I believe that
    there is a free flow cat. available on Ebay, Search 85 prelude or 87
    William Burke, Jan 15, 2005
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