[ljjcsautomotive]

I just installed a MSD5 ignition box and my Tack is all over the place. Any suggestion

on how to correct this?

 

[gmcjohnny]

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