I went thru 3 digital 6 boxes till i got a good one,(1)just quit working,the other 2 the rpm limiter wouldnt let the car go over 4800 and ran like sh-t,put my 6al back in and car would run fine every time, would also throw off the timing
I jus put a dig6 back in and this one has been running ok for now but i dont trust it and keep my 6al for back up.