E46 318 318i Touring 2002 Sounds really Rough
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  1. #1
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    318i Touring 2002 Sounds really Rough

    Hi guys, I have posted something similar before but my car is now sounding really rough on start up ticks over fine just sounds horrible for a few minuets. I do have catalyst efficiency code keep coming up so pointing towards that but if anyone has any other ideas please let me know. also any one know where god place to exhaust from?
    Cheeerrrrrssss guys!!

  2. #2
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    Probably a failing O2 sensor, my e46 316i started to feel very lumpy and after a week or two the engine light came on. I had the sensor changed and the smoothness improved a huge bit.

    open for correction here but that may also be the reason for your efficiency code

  3. #3
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    What was the error code exactly that came up ?

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