Jumpy 308 Speedo | FerrariChat

Jumpy 308 Speedo

Discussion in 'Technical Q&A' started by samtheclip, Aug 1, 2004.

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  1. samtheclip

    samtheclip Karting

    May 30, 2004
    176
    Buffalo, NY
    Full Name:
    Sam Pasceri
    #1 samtheclip, Aug 1, 2004
    The odometer works fine and is accurate but, the speed is not correct and always jumps up and down 20 - 30 mph. I removed the unit. Before sending it out I want to know if it is in the speedo itself or in the sending unit. I heard that there is a way to make a pulse generator what will make the look like it is going "x" MPH. I am not worried about making the car off my a mile or 2. I just refuse to send it out before know where the exact problem is. Does anyone know how to make a pulse generator and what wires to hook up where? I know that there are 3 main wires. I know it should not exceed 12V. Any help with this would greatly be appreciated.


    Thanks,
    Sam
     
  2. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,218
    MO
    #2 Auraraptor, Aug 1, 2004
    Perhaps some of the teeth in the gauge's gears are broken?
     
  3. don_xvi

    don_xvi F1 Rookie

    Nov 1, 2003
    2,934
    Outside Detroit
    Full Name:
    Don the 16th
    #3 don_xvi, Aug 1, 2004
    Try a search, maybe it has to be in the old forums, this has been discussed before. It could be a cable problem, or this might be like the way I fixed my MB speedo. For info on that, do an internet search on "BMW 2002 Speedo Repair".
     

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