I am doing a LSX swap. I was wondering when running fast Xfi do I need my factory harness and computer to control anything like the flashers, blinkers, wipers, pretty much the accessories.
I'm runing the fast classic. With a BS3 on order. If the white box that is attached to the stock ecm is the DRAC. I took mine out and I don't have any speedo problems. From what I understand the little white box attached to the ecm is a speed buffer. If you've ever used a data master you'll notice the the stock ecm monitors speed. That white box converts speedo information for the stock ecm.