Well it first started thursday at the track about 8th run of the night the car cuts out and looses all power, was able to idle it back to the pits, turned it off started it back up and all was good, till today i was driving to the store and it just died, wouldnt start for a good 10 min, then started up, set it back to stock and it was fluctuating at idle from 500-1000-500-1000-500-1000-500 etc for about a min, so far it hasnt done anything but i need to get this resolved, ive read about the fail safe mode, and what not but where should i look first, how do i check it and what should i start replacing?