So my unit started acting up today. It starts up like normal but every 5 minutes or so it will restart in the car. It is a z110 flashed to z120. It was flashed a while.back and since then no problems until now....Any help is appreciated! !!!!!!!

Since you had no problems immediately after the flash, I don't think there is a relationship. Two possibilities come to mind:

1 - heat. Not knowing where you live, could you now be usung your heater instead of air conditioning? The HU could be crashing due to overheating because the air under your dash is now hot. .

2 - a loose wire - either the + circuits (red, yellow) or the ground (black) could cause reboots randomly.