Hi all just became a member.I have a 08 S that I install new timing chain rings and head rebuilt.After all was done I got it started the ground on top of the valve I had it held in place with a vise grip.The next day I go to start it and it won't start, after a few time I remembered that the ground was off.Put ground on but still no start.connect scan tool and found DME has no communication.Check fuse box under hood and found DME fuses has no power.The relay has power but it is not getting ground which comes from the DME.Anyone has any ideas?