2007 Chrysler 300 loud pop and stall then codes 0440,0456

Hey, my wife and I are tired of dealing with our dealership since we have brought it there 4 times and the problem still exists. Ive had emission codes 0456,0440 for the last 2 months. The car has just stopped running and will restart after leaving it for a few minutes. Have replaced the nvld, and vac solenoid. Cleaned the throttle body. Out of answers.