FiTech EFI system
When you swap to the mopar dizzy do you leave the fitech set to vrcoil? If this is the case then then to fitech isnt seeing the msd dizzy for some reason
If you switch to fitech timing. The msd dizzy plugs into to wires from the back of the fitech. Purple and green ones then you need to switch couple of other wires. Unfortunately im not around my direction sheet right now.