2003 E46 320i, Opinions Please(Cold start misfire) - Page 7

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    #61
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    I have read that also, however, I do not see how it would only effect one cylinder.

    Also, the indy agreed with me that the smooth running for cylinder 5 at the misfire period was terrible..
    2003 E46 320Ci Coupe
     
     

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    #62
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    i wouldnt pay a lot of attention to it just being 1 cylinder i came a cropper on that one with me lean running fault it said only on bank 1 but it turned out to be the lower intake hose that feeds both banks i was eyeballing the bank 1 02 sensors up cos of it and sent me in the wrong direction briefly..


    fickle and twitchy things diags are at the best of times...
    330i sport a big chunk of berlin...

     
     

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    #63
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    I am definitely not ruling it out, however, it is more probable to be something that can only affect the one cylinder.

    I might get a screwdriver out and see if I can establish where this ticking is coming from in the morning.
    2003 E46 320Ci Coupe
     
     

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    #64
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    Well seems that the cold weather isn't making things any better!
    2003 E46 320Ci Coupe
     
     

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    #65
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    does it still missfire if you give it more revs on the pedal from cold?
    330i sport a big chunk of berlin...

     
     

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    #66
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    I have tried starting her and immediately revving and holding at 3k for approximately 10-15 seconds. This made no difference.
    2003 E46 320Ci Coupe
     
     

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    #67
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    im at a loss on this one...
    330i sport a big chunk of berlin...

     
     

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    #68
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    Well my indy has offered two different routes, although I am getting to the point of just getting rid and getting something else.
    2003 E46 320Ci Coupe
     
     

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    #69
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    This is what the indy has said:

    Hi Mike,

    Wont be cheap I’m afraid as the vanos has to come off to get the cams out to access the lifter. The Autodata standard repair times are quoting around 5.3 hrs (£258.75 labour) but does not include time to reset the cam timing or any parts that may be required (lifters, cam cover & vanos gaskets etc).

    Personally I would scope the injector & coil signals first – it’s cheaper & rules them out before major-stripping the engine apart! I would check those for a couple of hours labour, so £90 (may be less if it takes less time). However, as the car only does this when cold I may have to have the car for a couple of days to scope it when the fault actually occurs.
    Followed by

    I just double-checked & checking/resetting the cam timing alone is listed as 4.2hrs so I guess they have included that in the 5.3 as most of the works for both jobs are the same as far as I can see!
    So basically it is either a transistor in the ecu that is sending an incorrect signal to either coil or injector.

    Or it is one of/all the lifters on cylinder 5..

    Or neither..
    2003 E46 320Ci Coupe
     
     

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    #70
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    Having just done a bit more reading up on the lifters I found this:
    http://www.enginebuildermag.com/Arti..._problems.aspx

    Which doesn't really help..
    2003 E46 320Ci Coupe
     
     

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