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Thread: Is my car in limp mode?

  1. #1
    Join Date
    Jun 2006
    Location
    southaven miss.
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    108

    Default Is my car in limp mode?

    I have a 94 530it that i got cheap and have been fixing up. Just replaced the brake booster and got my brakes working great. Took it for a drive and car accelerates very slow and will not go above 40mph. I can see the rpm's shifting, but car takes forever to move. The first time it cleared up and car drove great, parked it at home then next day it started driving slow again and now it's staying that way. Does this sound like limp mode? I have disconnected the battery for a day,no help. I dont have a transprogram message. Thanks

  2. #2
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
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    14,839

    Default

    what codes do you get after the stomp test?
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #3
    Join Date
    Jun 2006
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    southaven miss.
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    108

    Default

    Im not getting any codes from the stomp test

  4. #4
    Join Date
    Mar 2006
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    Derbyshire, UK
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    872

    Default

    Plugged cat, exhaust, or intake, maybe?

    1997 535i V8
    5spd, OBC, A/C, cruise, BMW phone, factory M-Tech wheel & suspension, 18" Alpinas

  5. #5
    Join Date
    May 2004
    Location
    Japan
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    9,249

    Default

    Does your car have EML at all? That means fly-by-wire, so electronic accell and on the throttle valve there is a motor instead of a bowden cable.
    On a car with EML it could be limp mode, because the EML will go into limp mode if for example a wheel speed indicator does not give a plasuble signal.

  6. #6
    Join Date
    May 2004
    Location
    Windy City
    Posts
    606

    Default

    It can be your MAF (Mass Air Flow) sensor. It is located between air filter box and intake. Try cleaning it first. You can find MAF sensor cleaner in any auto parts store. But most likely it is bad from your description. Important Note: DON'T TOUCH THE SENSOR LEAD as it can be damaged easily. But you should check for fault code first so you don't waste money and time fixing something that's not broken...

    Quote Originally Posted by barry 90 525i View Post
    I have a 94 530it that i got cheap and have been fixing up. Just replaced the brake booster and got my brakes working great. Took it for a drive and car accelerates very slow and will not go above 40mph. I can see the rpm's shifting, but car takes forever to move. The first time it cleared up and car drove great, parked it at home then next day it started driving slow again and now it's staying that way. Does this sound like limp mode? I have disconnected the battery for a day,no help. I dont have a transprogram message. Thanks
    Last edited by Rick L; 11-27-2008 at 08:56 PM.
    RICK
    BMW 1995 525i (Alpine White)

  7. #7
    Join Date
    Jul 2006
    Location
    Twin Cities, Minnesota
    Posts
    71

    Default

    Barry,

    Welcome to the Touring club!

    My 94 530iT never responds to the stomp test, so I'm not surprised that yours doesn't either.

    Limp home acts like a car needing a tune-up or a sparkplug not firing rather than like something seriously wrong. Not the case here as it ran great once.

    Best of luck troubleshooting,

    Fin

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