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  1. New please help 
    #1
    Bimmer Fan
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    SNBAD's Car Details
    Model of Car:
    320d
    Year of Manufacture:
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    I joined this forum a while ago but never posted,
    I own a 2002 E46 320d touring and the only way I can get my bmw to boost is to build up the revs then back off then when I put my foot down again my turbo kicks in.
    Does anyone know what this problem could be?
     
     

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    #2
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    SNBAD's Car Details
    Model of Car:
    320d
    Year of Manufacture:
    2002
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    Since the last post I've swapped the pressure converters and de-catted the exhaust but the car still has the same boost issue.
    Any suggestions?
    I also plugged the EGR pipe but it seemed to make the car tickover poor so I re-fitted it.
     
     

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    #3
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    burnzybubbles's Car Details
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    i think these engines run vnt mechanisms have you checked that it's working freely, very typical for vag dervs to clog up but cause limp home mode as it over or under boosts, does it happen every time the revs drop below the boost threshold? really for problems like this best to get it on a diagnostic machine or get one yourself and log whats happening or search for fault codes, otherwise your just stabbing in the dark all the time.
     
     

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    #4
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    TheEnd's Car Details
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    It could be a failing or unplugged MAP sensor, they can even get clogged and dirty too, or sticky vanes as mentioned above.
     
     

  7.  
    #5
    Bimmer Fan
    Car Details
    SNBAD's Car Details
    Model of Car:
    320d
    Year of Manufacture:
    2002
    Transmission Type:
    manual
    Car Body Type:
    touring

    Join Date
    Oct 2011
    Location
    england
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    I have looked down towards the turbo but I don't really know what to look for. I am getting 2 new pressure converters next week just incase mine are both broke. The previous owner had a new turbo fitted about 3yrs ago and somehow the boost pipes are wrapped around the intake manifold, I attempted to take the manifold off to get to the MAP sensor but the boost pipes prevented me from lifting the manifold (what a waste if 3hrs lol) I really wish that I knew off by heart where all the boost pipes go then I would remove it with confidence and Remove the swirl flaps too. I removed the pollen filter the other day and the plate underneath, I could feel the MAP and unplug it but I couldn't find the bolt that holds it in place.
     
     

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