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A question about MSD [Expired Topic]

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by ljjcsautomotive, Sep 10, 2006.

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  1. I just installed a MSD5 ignition box and my Tack is all over the place. Any suggestion [​IMG]on how to correct this?
  2. gmcjohnny

    gmcjohnny Member

    RE: A question about MSD

    did you plug your tach into the msd box ?if you dont an leave it on coil i will go nuts theres a spade connector on the msd box thats your tach lead johnny
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