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Thread: E39 520i refusing to rev

  1. #1
    BMWHaus Contributor
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    E39 520i refusing to rev

    I drove the car, parked it no problem. It sat for 3mths so I hooked up the leads and it started first Turn. The only thing I did between times, I removed the abs unit and now it won't rev past 2500rpm. Any ideas?

    Sent from my Vodafone 858 using Tapatalk 2

  2. #2
    BMWHaus Guru
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    RE: E39 520i refusing to rev

    Quote Originally Posted by Dod
    I drove the car, parked it no problem. It sat for 3mths so I hooked up the leads and it started first Turn. The only thing I did between times, I removed the abs unit and now it won't rev past 2500rpm. Any ideas?

    Sent from my Vodafone 858 using Tapatalk 2
    Sounds like limp mode or something to that effect. As in the car knows the unit is removed and as a safety feature won't allow any hard driving?

  3. #3
    BMWHaus Contributor
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    Re: E39 520i refusing to rev

    My thinking also but I wouldn't have thought the lack of ABS would cause that.

    Sent from my Vodafone 858 using Tapatalk 2

  4. #4
    BMWHaus Guru
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    RE: E39 520i refusing to rev

    Quote Originally Posted by Dod
    My thinking also but I wouldn't have thought the lack of ABS would cause that.

    Sent from my Vodafone 858 using Tapatalk 2
    You have a few of these cars? Surely you could test?

  5. #5
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    RE: E39 520i refusing to rev

    ABS unit won't effect RPM....

    Best bet is just get the codes red and see what it says.

  6. #6
    BMWHaus Contributor
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    RE: E39 520i refusing to rev

    My money on the maf sensor. Disconnect it and try again.

  7. #7
    BMWHaus Contributor
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    Re: E39 520i refusing to rev

    I tried that but no joy. I've one I can try on my other 520i. I don't want to get the coded read as it's only to be driven into the garage and stripped but if I could pin point the problem I would know what to and what not to sell.

    Sent from my Vodafone 858 using Tapatalk 2

  8. #8
    BMWHaus Guru
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    RE: E39 520i refusing to rev

    Have a read

    http://www.bimmerfest.com/forums/showthread.php?p=5317309

  9. #9
    BMWHaus Guru
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    E39 520i refusing to rev

    Throttle body flap stuck. Take off the intake boot and free it up. 2.0 or 2.2 engine?

  10. #10
    BMWHaus Contributor
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    Re: E39 520i refusing to rev

    Its a 2.2l. I had a read of that link mate, just seems like a load of upright mofos, almost as bad as some folk from elsewhere. Lol

    I'll get a look round her tomorrow.

    Sent from my Vodafone 858 using Tapatalk 2

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