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360 tachometer needle swings wildly

Discussion in 'Technical Q&A' started by JimMigliaccio, Dec 5, 2018.

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  1. JimMigliaccio

    JimMigliaccio Karting

    Oct 1, 2008
    54
    #1 JimMigliaccio, Dec 5, 2018
    Hi All -

    I have a '99 360 F1 with a tach reading that has no relevance to the engine speed. Ii seems to settle in random places and only occasionally moves. Is there a bad ground (my 1st thought with an electronic tach) or is the needle off its pivot? Any help would be greatly appreciated.

    Cheers, Jim
     
  2. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,365
    Frederick, Maryland
    Full Name:
    Brian Brown
    #2 Motob, Dec 5, 2018
  3. RedNeck

    RedNeck F1 World Champ
    Silver Subscribed

    Jul 8, 2016
    12,288
    The CSA
    Full Name:
    Me
    #3 RedNeck, Dec 6, 2018
    I have had to replace stepper motors within my instrument cluster, the symptoms were very similar to what you are seeing. If you are handy, it can be a DIY job. The biggest pain is removing the cluster from the car, which you would have to do no mater what.
     

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