77 Z28 Stock Tach Out 500 rpm

Discussion in 'Gauge Marks' started by 77ZDER, Jun 27, 2019.

  1. 77ZDER

    77ZDER Member

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    Hi
    I have a 77 Z28 with original gauges. I also have an MSD street fire distributor, MSD 6AL-2, and MSD 8920 Tach filter. I have connected everything according to the instructions and the car runs great. The problem I have is that the tachometer is out 500 rpm. It doesn't make a difference when the filter is connected or not, both give the same results.
    Any advise would be appreciated...
    Thanks
    Dave
     

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