My wife delivers newspapers out of her 2006 cobalt. Within the last month the car has began idling rough and has started stalling on her. To make matters worse the power steering gets extremely hard to turn sometimes but seems to be related with the battery not charging because of all the stops. I have put plugs and a fuel filter on her car, trying to get an idea of where to go from here. BTW its a 2006 LS with 81000miles.