Here a few weeks ago I had new heads and head studs put on my truck, its an 06 F250 with 122,xxx miles, ran great for a few days, now it shuts down while driving. It does not sputter or spit, the motor just quits. All lights stay on and the cab has complete power. It does not throw any codes and fires right back up. It isn't missing and according to scan tools all injectors are good. When it runs it has great power and everything is fine then it just decides it needs to take a breather. Shop told me the FICM is losing voltage but then why does it start back up right away? If anyone has had these issues please let me know how to get rid of them, I spent all my money on heads, head studs, coolant filtration system, blue spring upgrade, and oil cooler. Thanks.