E38 1999 4.4 Misfire on heavy loads

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  1. E38 1999 4.4 Misfire on heavy loads 
    #1
    Bimmer Fan
    Car Details
    marinis69's Car Details
    Model of Car:
    740i
    Year of Manufacture:
    1999
    Transmission Type:
    auto
    Car Body Type:
    saloon

    Join Date
    Nov 2009
    Location
    Ashford Kent
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    Hi,
    My 740 starts to misfire on the hard acceleration, EML light cames on when booting hard and it feels that there is no power at all after engine reaches 5000rpm. I have read the codes:
    P1341 Multiple Cylinder Misfire With Fuel Cut-off
    P1349 Misfire Cylinder 4 With Fuel Cut-off
    P1357 Misfire Cylinder 8 With Fuel Cut-off
    P1355 Misfire Cylinder 7 With Fuel Cut-off
    P1351 Misfire Cylinder 5 With Fuel Cut-off
    Any ideas what could cause the problem ??? I have recently replaced air filter and spark plugs (Bosh super 4); no oil leak on plugs nothing. Thanks for you help.
    Last edited by marinis69; 09-03-2010 at 00:53. Reason: new simptoms
     
     

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  3.  
    #2
    RYM
    RYM is offline
    Legendary BFuk Member
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    RYM's Car Details
    Model of Car:
    325tds
    Year of Manufacture:
    1996
    Transmission Type:
    Manual
    Car Body Type:
    Touring
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    Join Date
    Apr 2008
    Location
    Bristol
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    I'm not familiar with the 7 series but I've had a fault like this before.

    First time it turned out to be a faulty coil pack and the second time was the cam or crankshaft sensor.

    Hop this helps in pointing you in the right direction

    PS Coil pack won't show on a diagnostic scan


    Other than this I would inspect ALL vacuum/breather pipes for splits as air entering the system AFTER the MAF will play havoc with the running of the engine
     
     

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