What could be the reason my 2010 Ford fusion cranks but wont start???

A mechanic that is stumped concerns me. This isn't hard stuff. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops You have a fuel delivery concern, an ignition spark concern or an air intake concern. The absolute first thing I'd check is the fuel cut off inertia switch, located at the passenger front kick panel area. If this is tripped, fuel supply will stop and the engine will stall. Check here first.