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failed emissions test
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Thread: failed emissions test

  1. #1
    Noobinator
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    Default failed emissions test

    hey my name is mike. i have a 90 legacy wagon and i took it in for emissions test the other day and it failed due to high carbon monoxide. anyone got any idea what would cause this motor to be putting out almost 4% carbon monoxide? thats the only thing stopping it from passing the im test. thank you in advance for any help.

  2. #2
    TSF Top Poster
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    Default

    high CO means your engine is running rich...too much fuel.

    check for:
    clogged air filter, leaking fuel injector, high fuel pressure, oil is contaminated, engine is not fully warmed up, coolant temp sensor, intake air sensor

  3. #3
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    Default

    awesome that gives me somewhere to start, thank you very much

  4. #4
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    Default

    well, took me a while but i figured out what is wrong with my lagacy. cats are goin bad, i just found out today

  5. #5
    Suby Talker
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    failed emissions test,
    Good report and you didn't have any code. There must be CEL on. Bigisland

  6. #6
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    yeah the cel was on for a little whilebut i replaced the o2 sensor, and both coolant temp senders and havent seen it since. I did smell sulphur one day when i took the car on the highway though, and thats what tells me the cats are startin to go bad. Thanks for all the replies though, they helped me quite a bit because this is the first subaru ive ever owned

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