I have personally battled it out with two different Digi 6's on two different cars and never won. Ended up going back to the good old 7AL2 and 6AL2 boxes with all of the add-ons. I'm not saying that some of the advise above couldn't clear up you problem but my experience has not been all that great.

That said I have a pal that swears by them and has been running one for a few trouble free years on the street.