Strange tach problem 325i

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  • TheTwigster
    Noobie
    • Sep 2015
    • 2

    #1

    Strange tach problem 325i

    My tach works.. Until outside temp is around 80 degrees. If I was already driving before it was hot outside it will continue working fine, but if I start it up after the day gets hot my tach is dead. Anyone have any ideas? I couldn't seem to find any threads on temperature based tach issues. Thanks in advance
  • dnguyen1963
    R3VLimited
    • Nov 2011
    • 2648

    #2
    Your SI board is likely to have some cracks. As temp gets hot things expand.

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    • estoguy
      E30 Enthusiast
      • May 2013
      • 1087

      #3
      I second on the SI board.
      Estoguy
      1986 BMW 325, Alpenweiss ~ "Elsa"

      Need a photographer, come visit my site: http://estoguy.wix.com/unique-perspectives

      Comment

      • TheTwigster
        Noobie
        • Sep 2015
        • 2

        #4
        Thank you both very much I appreciate the help :)

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