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Tach Reading Low..

Discussion in 'General Chat' started by markboss, Nov 19, 2016.

  1. markboss

    markboss Member

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    Tach reads correct at idle around 900..
    At 1500 rpm tach reads 1200
    at 3000 rpm reads 2000
    Scanmaster used for reference.
    Anybody have any idea on repair?
     
  2. kidsixpack

    kidsixpack Well-Known Member

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    I've never heard that with these (modern cars) but like the old ones maybe the tach is wearing out. Hopefully someone here will have some insight.
    KID
     
  3. TTA984

    TTA984 Gold Member

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    Did some testing today with tach & scanmaster. My readings were very close to the same, + or - .25 on all readings.
     

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