Tony I fought with this a few years ago after changing to a digital 6 plus box from a old analog 6AL. Mine would kick back on the starter about 1 in 4 starts.
With the digital 6 box and HVC coil I had NO improvements just shorter cap and rotor life and shorter plug life on a indy headed 12:1 427cu in small block on e85.
I went back to the analog MSD 6AL stating issue went away, cap and rotor life improved, same ET and MPH. My personal opinion is the Digital 6 box is a POS.
Try something else
I've had a couple others say the say thing.. I do have a 6al sitting around... Did you also use the separate starter saver?
