2005 E46 320d, Newbie in need of expert MPG help!

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  1. 2005 E46 320d, Newbie in need of expert MPG help! 
    #1
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    DERVMSPORT's Car Details
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    Hello all on this cold morning..

    I would like to say i am a proud new owner of an e46 320cd Msport. It is one of the late ones on a 55 but im not feeling so proud right now consideting its my first bm and hasnt given me the best impression.

    Maybe im just being a sour grape as you would think a bm would live up to its expectations. having said that it is a lovely car and im glad i bought it however i have a problem that is annoying me..

    and that is very poor fuel economy. having come from jap cars and not knowing much about bm's i had a feeling it was drinking way too much fuel and to my demise when i finally found the mpg on the obc it read 30mpg.

    i took it out of town last week and i drove like a granny 70mph 6th gear and the most i got out of it was 39mpg.

    so i'll keep this brief seeing as its my first post in the newbie section.

    any suggestions?
    thanks
     
     

  2. The Following User Says Thank You to DERVMSPORT For This Useful Post:

    Steve Clark (12-02-2012)

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    #2
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    well having read all 11 pages of harristheo's story im not the only one experiencing poor mpg and its given me some direction on where to start so ive got it booked in on monday!
     
     

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    #3
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    Joe9087's Car Details
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    Welcome to the forum

    Glad you're starting to find the site useful already, hopefully you'll get better mpg soon. Economy is always worse around town than on a run.
    If you check out the "General BMW Discussion" section, you'll see a thread called "Real World MPG Figures" - have a look at that to get an idea of what you should be seeing economy wise
     
     

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    #4
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    Foolishbean69's Car Details
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    I thought 30-40mpg was pretty good for a motor with what, 187bhp?

    Maybe my glasses are tinted cause my last car, a petrol e36 (with a breathing issue) did like 15-20mpg!! I'd prefer it to be higher but i blame my driving style for my 37ish MPG in the 330d.

    Might be worth checking thermostats and stuff - something i'd like to get round to myself.
     
     

  8.  
    #5
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    Thanks for the welcome guys. i've picked up alot of information already thanks to the forum and i only went and bought the car having done alot of research before hand.
    I've had a look at the real world figures. Lets put it this way i think i would be better with a 325ci right now because £50 of diesel got me 340 miles which included mostly motorway and a-roads and round town well lets not go there but it is quite disheartneing to run in to problems when you've just bought a car especially one that holds a lot of credibility such as a bm.
     
     

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    #6
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    Quote Originally Posted by DERVMSPORT View Post
    Thanks for the welcome guys. i've picked up alot of information already thanks to the forum and i only went and bought the car having done alot of research before hand.
    I've had a look at the real world figures. Lets put it this way i think i would be better with a 325ci right now because £50 of diesel got me 340 miles which included mostly motorway and a-roads and round town well lets not go there but it is quite disheartneing to run in to problems when you've just bought a car especially one that holds a lot of credibility such as a bm.
    £50 for 340 miles? That really doesn't sound too bad mate.

    I get about 350-400 miles from mine on an £88 tank of Vpower if I let my foot get a bit heavy. Perhaps 450 if i'm taking it easy.

    Out of interest What kind of MPG were you expecting?

    I take it high MPG was a major factor in your purchasing decision?
     
     

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    #7
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    coming from a clk 230kompressor yes it was mate. I was expecting around 38-40 round town and around 50 on motorway runs which is what ive been reading from other owners and have seen on other 320d's but i know for sure mine is a lot lower than it should be.. plus doesnt pull aswell in my opinion. Sometimes i feel the power and sometimes it really lags but im not going to jump to conclusions just yet.. well till monday at least.lol
     
     

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    #8
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    Not had the problem myself, but reading other threads, MAF sensor is favourite. Your mechanic is sure to check it isn't he?
     
     

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    #9
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    Hi and welcome along to Bimmerforums UK, it's good to have you on board.
     
     

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    #10
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    Thanks for the warm welcome people.,
    well i went to the garage this morning and had a diagnostic check carried out. The indie is an ex-bm technician so he showed me the ins and outs of the car.
    Unfortunatley after clearing a few error codes and taking it for a run he gave me the bad news saying the boost pressure controller is not opening up correctly or is opening up intermittently hence the laque of torque and the poor fuel economy.. or something along them lines. I dont know the exact component he was referring to or if that is the correct name for it but he mentioned that the component is part of the turbo and can not be bought seperatley...

    so guys any thoughts/advice/on where i should go to get a turbo and what i should be looking out for..

    this is not a good start to my bmw
     
     

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