My 2011 grand caravan this afternoon won't start or even have any power and the key fob gets stuck in the ignition. When we hook it up to be jumped the power comes back and van cranks but wont catch and start.

 

If you know how to remove the battery from the vehicle and have another vehicle (or a friend to drive you) take the battery to AutoZone and have them charge it and test it for free. If you don't have an AutoZone near you I think their major competitors (O'Reilly, Advance, Napa) also offer this service. If after reinstalling the battery (or installing a new one if your battery was bad) the car still cranks but doesn't start you either have a fuel supply problem or an ignition problem.