Van will not start on 2003 Kia Sedona

Van turns over but will not hold charge (stay running) It acts like it wants to crank but will not. Yes, I do have gas :)Please help me figure this out.

Thank you

1 answer
If it turns over and wont start check for spark at the plug wires.If it will start and shut off you pro bably have a bad alternator I need to know more info on what it is doing