2003 E46 320i, Opinions Please(Cold start misfire) - Page 4

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    #31
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    BMW do 3 Bond Seal now. Part #: 07589062376 and costs £9. Could have ordered that from Hereford as well, but the one in your link is ok to use as well.
     
     

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    hontoir (25-08-2011)

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    #32
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    I wish I had double checked that when ordering, ah well, I will pop to the local motor factors and get the equivalent.

    Some pictures so far:





    2003 E46 320Ci Coupe
     
     

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    #33
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    Rocker cover refitted with new gasket and nothing has changed. First two starts threw out 242 error codes and the third was fine. I did notice, however, when revving the car afterwards that when the revs drop they dropped to around 500 before picking back up to around 700. Is this normal?

    I think I will be looking for vacuum leaks next.
    2003 E46 320Ci Coupe
     
     

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    #34
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    Have you cleaned the Idle control valve and throttle body? There are some excellent DIYs.
     
     

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    #35
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    I haven't done those, but wouldn't they bring up misfires on more than one cylinder?
    2003 E46 320Ci Coupe
     
     

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    #36
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    Cam chain looks good.

    Misfire on one cylinder consistently? Probably not. If you've swapped all the plugs and coilpacks, consider the Grounds.
     
     

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    #37
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    Which grounds are you referring to? I have checked the ignition coil one.
    2003 E46 320Ci Coupe
     
     

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    #38
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    Quote Originally Posted by hontoir View Post
    Which grounds are you referring to? I have checked the ignition coil one.
    Yep, coil 5 to GND. Again, move them all along one and see if the fault moves to a different cylinder.

    After that, I'm out of ideas I'm afraid.
     
     

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    #39
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    There is only one earth for all 6 of the coils.
    2003 E46 320Ci Coupe
     
     

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    #40
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    Update:

    Started her last night as normal, again first start of the day, so started missing and then went away. Stopped outside a friends house and there was some smoke coming out of the exhaust (not a huge amount).

    Started her this morning with the MAF disconnected, seemed to start better (so is this sign of a vacuum leak?) I then checked the rough settings and cylinder 1 was rougher than the others, reconnected the MAF and this dropped straight back down.

    Also judging by the plugs and the smell she is running slightly rich (again maybe a vacuum leak?)

    Here are the fuel settings, not sure what any of this means though.
    2003 E46 320Ci Coupe
     
     

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