2003 E46 320i, Opinions Please(Cold start misfire) - Page 2

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    #11
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    Nice, bit of money saved as well

    Slow boat China sells the same cable for 3 quid if you want to wait a few weeks
     
     

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    #12
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    Quote Originally Posted by hontoir View Post
    I took the hit and soldered the two together, and it works.. although I managed to burn two of my fingers which is making typing a little hard.

    So I read the errors:


    Cleared them and let the engine run for a bit, then rescanned for errors:
    Could it be a duff coil pack? Run the ROUGH test. It will give you a reading for the rotational energy supplied by each cylinder. You can also swap the coil packs around and see if the fault follows the coil pack.

    Do not reset adaptations while the engine is running. Expect rough running and high idle for the first 100 miles after reset.
     
     

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    #13
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    The ROUGH test is as follows:

    Cylinder 5 now has a different coil pack in it, however, it progressively gets rougher until the new ignition cycle kicks in, the idle revs drop, and the cylinder runs smoother.
    2003 E46 320Ci Coupe
     
     

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    #14
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    So if the cylinder has a new coil pack, the cheapest thing to do is reset the adaptations with the engine off and take it for a good spanking. The engine will have made severe alterations to the ignition timing on Cyl 5 to compensate for the dodgy spark, and they need to be cleared out.
     
     

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    Ok, can you talk me through resetting the adaptations please, I am still slowly trying to get to grips with using INPA.
    2003 E46 320Ci Coupe
     
     

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    Quote Originally Posted by hontoir View Post
    Ok, can you talk me through resetting the adaptations please, I am still slowly trying to get to grips with using INPA.
    Turn the engine off and hit F7 on this page no?


     
     

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    #17
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    Well I reset all of the adaptations, started it again and the rough reading for cylinder 5 did exactly the same as normal. Spiked and then died away again after the idle drops.
    2003 E46 320Ci Coupe
     
     

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    #18
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    OK, well trying to stick with the cheapest solutions first, are you sure you got cylinder 5 right? It could be they are grouped 1-3-5 and 2-4-6 and interleaved. It is a cheap job to jumble up all the coil packs and see if the fault moves. Also while you are there check all the GNDs and make sure the spark plugs are tight.

    Next did you take it for a good run out after doing hte reset? Another free one.

    Next cost up could be changing the plugs, doing a compression test and replacing the valve cover gasket and spark plug gaskets.
     
     

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    #19
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    I swapped coils 3 and 5 this morning and 2 and 5 yesterday morning. Spark plugs were also checked yesterday.

    I have not taken it for a run yet, will reset adaptations again and do so.

    Plugs were only just changed, so would be nice to think they are probably ok. So a compression test is next on the card if a good run doesn't help matters.
    2003 E46 320Ci Coupe
     
     

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    #20
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    Just an update, checked the spark plugs again, there seems to be alot of carbon build up on them all, some even having what looks like traces of oil.

    So I cleaned them all up and reset adaptations again and took it for a blast.

    Will let her cool down then check the plugs again and then I'l run the INPA again when shes cold.
    2003 E46 320Ci Coupe
     
     

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