E46 323 Cylinder 5 faulty?**FIXED**
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  1. #1
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    Cylinder 5 faulty?**FIXED**

    Before plugs were changed>



    Fresh plugs and still showed cylinder 5 to be faulty?

    Change coil pack and still cylinder 5 faulty?

    What else is there check?

    Thanks
    Last edited by steveo76; 01-09-2012 at 21:54.

  2. #2
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    Check to see if there is a spark, and maybe see about a compression test too.

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    Quote Originally Posted by TheEnd View Post
    Check to see if there is a spark, and maybe see about a compression test too.

    I will do mate,,Car runs smooth as silk and picks up real well?? i will check for a spark and post back my findings

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    Yes there is a strong spark???

  5. #5
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    Next on the list to try is a compression test

  6. #6
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    Yep, compression and injection next.
    There isn't easy ways of checking the injectors without spraying fuel everywhere, and looking for damp plugs isn't great incase it's just clogged and injecting a small amount.
    You could try yanking one out and swapping it with a different cylinder, I'd recommend cyl2, and see if the misfire follows it.

    The rough running from top to bottom is the firing order, I think that cyls 3 and 6 are only low as they are on catchup trying to make up for the misfire on 5.

  7. #7
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    Quote Originally Posted by TheEnd View Post
    Yep, compression and injection next.
    There isn't easy ways of checking the injectors without spraying fuel everywhere, and looking for damp plugs isn't great incase it's just clogged and injecting a small amount.
    You could try yanking one out and swapping it with a different cylinder, I'd recommend cyl2, and see if the misfire follows it.

    The rough running from top to bottom is the firing order, I think that cyls 3 and 6 are only low as they are on catchup trying to make up for the misfire on 5.
    Thanks for the input mate.....

    I put some system fuel cleaner before RedX and took it for a blast thinking it may well be as you have suggested a blocked injector!

    Still no change to Cylinder 5..

    BUT i now have two new codes....Lambda sensor Bank1 and Bank2 ,,,,,,,,With both sensors faulty would this be the mystery cause of cylinder 5 up the duff?....It has been drinking fuel a lot as well lately!






  8. #8
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    It might be the result of the redex, or an airleak.
    Both lambda saying problems usually means something before the engine.

    Once warmed up (you'll see lambda sensor heating drop down) watch the sensor values, and you should see them flick high to low about once a second.
    The post cat lambda sensors should just jump around a little bit at the lower end of the scale.

  9. #9
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    wots the STFT and LTFT doing???


    ide be tempted to disregard those codes as spikes or gremlins from ya mucking about with redex and the missfiring and stop starting etc etc..

    if the error frequency goes up ide be more concerned, ide sort the missfire out first then go from there...

    i dunno but myself ide clear everything then run it briefly on the default limp map with the MAF unplugged see what it runs like perhaps rule out any sensor and fueling control issues??
    Last edited by dailydoggy; 31-08-2012 at 18:47.

  10. #10
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    Quote Originally Posted by dailydoggy View Post
    wots the STFT and LTFT doing???

    I don't know what you mean by that mate??


    ide be tempted to disregard those codes as spikes or gremlins from ya mucking about with redex and the missfiring and stop starting etc etc..

    if the error frequency goes up ide be more concerned, ide sort the missfire out first then go from there...

    i dunno but myself ide clear everything then run it briefly on the default limp map with the MAF unplugged see what it runs like perhaps rule out any sensor and fueling control issues??

    Ok i will give that a go,,Clear codes, unplug MAF and run the car....

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