Question about Plymouth Sundance

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I'm trying to smog my 1992 sundance and I need a aspirator silencer & aspirator valve assembly but I can't find these parts

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  • Thelma Brown Apr 30, 2010

    Emissions to high was told that it was proably the catalytic converter or a senscer when checking it was found that someone had taken these parts off the car and had put a plug in the end of the cat conv

  • Thelma Brown Apr 30, 2010

    It doesn't change anything I still need help

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I have never heard of these terms for a smog failure. what did you fail for and was this diagnosed by a professional. ?? I have smogged thousands of cars.

Posted on Apr 30, 2010

  • Susan Price Apr 30, 2010

    well for a 1992 you should have one 02 sensor inbetween the cat and the engine. alot of cats have a plug about midsection that is used if the car has air injection (an air pump ). If the co was high that could indicate a failed 02 sensor but also you HC's would be high also Also the cat could be toast causing the same two reading to be high. alot of cats replaced for no reason when the vehicle is not diagnosed properly and in the same case alot of 02 sensors are also replaced when the cat is the problem. Then still yet on a car this old if all the parts are on the car its possible the computer failed causing these two reading to be high. Also any exhaust leaks before the 02 sensor would cause both the hc and co to be high.

    If just the HC is high that would indicate you need a tuneup or some other issue is causing a misfire.

    All these things can be tested at a repair shop providing your not missing any parts. If you are missing parts then your going to have to have them installed before doing anything.

    I would recommend paying to have this professional diagnosed once you determine all the parts are installed correctly since doing anything else would just be guessing and it get frustrating and unnecessarily expensive.

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