Anyone ever hear of MSD ignition boxes or MSD distibutors causing aftermarket gauges to work improperly. Tach is off at various speeds sometimes speedo does not work (no reading) if so any solutions
Well all you need to do if you havent is hook up your coil tach wire (- termincal wire) into your MSD box. I am stilll confused on your speedo problem. Might be the cable but they should either work or not work.